Download - ARK-30 - Optic-Handel Fragstein

NIDEK

AUTO REF/KERATOMETER

ARK-30Type R

OPERATOR’S MANUAL

NIDEK CO., LTD. : 34-14, Maehama, Hiroishi-cho, Gamagori, Aichi 443-0038, Japan(Manufacturer) Telephone: (0533) 67-6611

Facsimile: (0533) 67-6610NIDEK CO., LTD : 6th Floor, Takahashi Bldg., No.2, 3-chome, Kanda-jinboucho(Tokyo Office) Chiyoda-ku, Tokyo 101-0051, Japan

Telephone: (03) 3288-0571Facsimile: (03) 3288-0570Telex: 2226647 NIDEK J

NIDEK INCORPORATED : 47651 Westinghouse Drive Fremont, California 94539, U. S. A.(United States Agent) Telephone: (510) 226-5700

Facsimile: (510) 226-5750NIDEK SOCIETE ANONYME : Europarc 13, rue Auguste Perret, 94042 CRETEIL, France(Authorized Representative) Telephone: (01) 49 80 97 97

Facsimile: (01) 49 80 32 082005.1

32725-P902GPrinted in JAPAN

BEFORE USE OR MAINTENANCE, READ THIS MANUAL.

The Operator’s Manual contains information necessary for the operation of the NIDEKAUTO REF/KERATOMETER Model ARK-30.This manual includes operating procedures, cautions for safety, and specifications. Thedevice complies with ISO 10342 (Ophthalmic instruments - Eye refractometers). IECand UL standards are applied in this manual. The dioptric powers are indicated withreference wavelength λd = 587.56 nm. For correct use, this manual is needed. Especially,the cautions for safety and operating procedures must be thoroughly understood beforeusing the device. Keep this manual handy to verify use whenever necessary.There are no user-serviceable parts inside the device except the printer paper, fuse, andbattery. If you encounter any problems or have questions about the device, contact yourauthorized distributor.

(This applies only to the equipments whose power source is 100/120Vac.)

Page

Table of Contents

§1 INTRODUCTION ........................................................................................................ 1-11.1 Outline of the Device ............................................................................................... 1-11.2 Indications for Use ................................................................................................... 1-11.3 Classifications .......................................................................................................... 1-11.4 Symbol Information ................................................................................................. 1-2

§2 SAFETY ........................................................................................................................ 2-12.1 Cautions during Use ................................................................................................. 2-12.2 Storage ...................................................................................................................... 2-62.3 Transport................................................................................................................... 2-62.4 Installation ................................................................................................................ 2-72.5 Wiring ....................................................................................................................... 2-82.6 After Use .................................................................................................................. 2-82.7 Maintenance and Checks .......................................................................................... 2-92.8 Disposal .................................................................................................................... 2-92.9 Labels ..................................................................................................................... 2-10

§3 CONFIGURATION ..................................................................................................... 3-1

§4 OPERATING PROCEDURES.................................................................................... 4-14.1 Operation Flow ......................................................................................................... 4-14.2 Before First Use ....................................................................................................... 4-14.3 Measuring Procedures .............................................................................................. 4-44.4 AR (refractive error) & KM (corneal curvature radius) Measurements (R/K mode) .......................................................................................................................................... 4-184.5 AR (refractive error) Measurement (R mode) ........................................................ 4-204.6 KM (corneal curvature radius) Measurement (K mode) ........................................ 4-224.7 90º Angle Correction Function ............................................................................... 4-244.8 Measurement Using Cable ..................................................................................... 4-264.9 Storing and Printing Measured Results .................................................................. 4-28

4.9.1 Storing measured results ............................................................................... 4-284.9.2 Printing stored data ....................................................................................... 4-304.9.3 Clearing measured results in memory ........................................................... 4-324.9.4 Confirming measured results in memory ...................................................... 4-33

4.10 Connection with External Devices ....................................................................... 4-344.10.1 Output to the RT or computer ..................................................................... 4-344.10.2 Input from the LM ....................................................................................... 4-364.10.3 Output to the IC card Reader/Writer ........................................................... 4-38

4.10.4 Output to the IC card Reader/Writer (EyeCa-RW) ..................................... 4-404.11 Sagittal Radius Measurement ............................................................................... 4-42

§5 PRINTOUT ................................................................................................................... 5-15.1 Printing Measured Values ......................................................................................... 5-15.2 Other Prints .............................................................................................................. 5-5

5.2.1 Printout sample of stored data ......................................................................... 5-55.2.2 Printout sample of parameter .......................................................................... 5-6

§6 OTHER FUNCTIONS ................................................................................................. 6-16.1 Parameter Settings .................................................................................................... 6-16.2 Setting Date and Time .............................................................................................. 6-96.3 Entering Comments ................................................................................................ 6-11

§7 TROUBLESHOOTING GUIDE ................................................................................ 7-1

§8 MAINTENANCE ......................................................................................................... 8-18.1 Replacing Printer Roll .............................................................................................. 8-18.2 Installing/Removing Battery .................................................................................... 8-38.3 Charging Battery ...................................................................................................... 8-48.4 Attaching/Detaching the Strap.................................................................................. 8-68.5 Attaching the Eye Mask ........................................................................................... 8-88.6 Replacing Fuses........................................................................................................ 8-98.7 Cleaning the Measuring Window ........................................................................... 8-108.8 Cleaning Exterior ................................................................................................... 8-118.9 Lists of Replacement Parts ..................................................................................... 8-11

§9 SPECIFICATIONS ...................................................................................................... 9-1

§10ACCESSORIES .......................................................................................................... 10-110.1 Standard Accessories ............................................................................................ 10-110.2 Optional Accessories ............................................................................................ 10-1

§11EMC (ELECTROMAGNETIC COMPATIBILITY) .............................................. 11-1

APPENDIX. A GLOSSARY ................................................................................................. A-1

INDEX ...........................................................................................................End of this manual

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1.1 Outline of the Device

The NIDEK Auto Ref/Keratometer ARK-30 is an objective refraction measurement device thatcontains the functions for measuring refractive errors such as spherical power, cylindrical power,and cylinder axis and the functions for measuring corneal shapes such as the corneal curvatureradius (corneal refractive power), angle of meridian, and corneal cylindrical power.The measured value of refractive errors are mainly used as the reference of the lens prescriptionfor correction of visual acuity in spectacle and contact lenses. The measured value of the cornealcurvature is used for the prescription of visual acuity corrective lenses such as contact lenses. Itis also used to observe the corneal curvature radius necessary for setting the refractive power ofintraocular lens that will be implanted after cataract surgery and the change process of thepostoperative corneal shape after corneal surgery.This device is a hand-held type that allows children who cannot fix their head on the stationarychinrest and lying patients to be measured. As well as the compact station, the device can beeasily moved, which makes the measurement possible in a sick room or operating room wherethe measurement is not possible with the stationary type.The device consists of a measuring unit and a station. The station is provided with a power supply,a charger, and a printer to print the measured results. The measuring unit is provided with a colorLCD monitor and a control panel, etc. to perform alignment and operation.To make the measurements easier, an auto-shot function is available, which will start themeasurement automatically when the patient’s eye is aligned and focused.The built-in RS-232C interface allows you to output data to a personal computer.

1.2 Indications for Use

The Model ARK-30 Auto Ref/Keratometer is a diagnostic device that is indicated for use in theautomated measurement of refractive errors of the eye, and in the measurement of the cornealcurvature of the eye.

1.3 Classifications

[Classification under the provision of 93/42EEC (MDD)] Class IIaThe ARK-30 is classified as a Class IIa device.

[Form of protection against electrical shock] Class IThe ARK-30 is classified as a Class I device. The Class I device is a device in which protectionagainst electric shock does not rely solely on basic insulation. The Class I device includesadditional safety precaution that provides for a connection of accessible conductive parts to aprotective (earth) grounding conductor in the fixed wiring of the installation.Use a power outlet which is equipped with a ground terminal.

§1 INTRODUCTION

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[Degree of protection against electrical shock] Type B applied partThe ARK-30 is provided with a Type B applied part.The Type B applied part provides an adequate degree of protection against electrical shock,particularly regarding the following:- allowable leakage currents- reliability of the protective earth ground connection (if applicable)

[Degree of protection against liquid entry] IP20*1

The ARK-30 is classified as a normal device, as such provides only minimal protection againstliquid intrusion.Avoid splashing water or another liquid on or in the device.

[Degree of protection against flammability]The ARK-30 is classified as a device not suitable to be used in a potentially flammableenvironment.Do not operate the device near flammable type materials.

[Method (s) of sterilization or disinfection recommended by the manufacturer]The forehead rest can be cleaned with a cloth dampened with rubbing alcohol as necessary.

[Mode of operation]Classification of the ARK-30: Continuous operation

1.4 Symbol Information

This symbol on the device indicates that caution must be taken.Refer to the operator’s manual before use.

This symbol indicates that the degree of protection against electrical shock of the appliedpart is classified as a Type B applied part.

This symbol on the control panel indicates the start button for placing the device in themeasurement mode.

This symbol on the control panel indicates the power button for turning the measuringunit on and off. Pressing the button turns the measuring unit on and off.

*1 In accordance with IEC 60529

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This symbol on the station indicates that the power is on.

This symbol on the station indicates that the power is off.

This symbol on the control panel indicates the print button for transmitting the measuredresults to the station for printing out.On the station, this symbol indicates the feed button for feeding the printer paper.

This symbol on the control panel indicates the parameter button for displaying the menuto change the settings on the screen.

This symbol on the control panel indicates the memory button to store the medianvalues of the measured results.On the station, the illuminated lamp for this symbol indicates that AR and KM data thatwill be outputted externally are being stored in memory.

This symbol on the control panel indicates the angle correction button for rotating themeasuring optical axis 90°.

This is the symbol on the control panel and station. The lamp with this symbol flasheswhile the battery is being charged.

This symbol indicates the fuse rating.

This symbol indicates that the device must be supplied only with alternating current.

This symbol indicates the connection part that is suitable for direct current only.

This indicates the input part.

This indicates the output part.

This symbol on the station indicates that power is supplied to the station and the powerswitch is turned on when the lamp with this symbol is illuminated.

§2 SAFETY

In this manual, a Signal Word is used to designate the degree or level of safety alerting.The definition is as follows:

CAUTION: Indicates a potentially hazardous situation which, if not avoided,may result in minor or moderate injury or property damage accident.

Even situations indicated by “ CAUTION” may result in serious injury under certainconditions. Safety precautions must be strictly followed at all times.

2.1 Cautions during Use

CAUTION• Do not modify or touch the inside of the device.

This may result in an electric shock or a malfunction.

• Do not dismantle or modify the battery.Heat generation, explosion, or combustion may result.

• Never remove the power cord from the wall outlet by holding on to the cord.This may damage the cord and cause a short circuit or an electric shock. Grasp the plugthen pull.

• Do not place heavy objects on the power cord to prevent damage to the power cord, anda fire or an electric shock.

• Immediately replace the power cord if the internal wires are exposed, the device powerturns on or off when the power cord is moved, or the cord and/or plug becomes extremelyhot.

This may result in an electric shock or a fire.

• Do not use the device for other than the intended purpose.NIDEK will not be responsible for accidents or a malfunction caused by carelessness.

• Wipe between the prongs of the main plug with a dry cloth every once in a while.If dust settles between the prongs, the dust will collect moisture, and a short circuit or afire may occur.

• Before measuring a patient, wipe the forehead rest with a clean cloth.If necessary, wipe the forehead rest with a cloth dampened with rubbing alcohol.

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CAUTION• In the event of a malfunction, do not touch the inside of the device, but disconnect the

power cord from the wall outlet and contact your authorized distributor.

• There may be cases where a measuring eye (R/L) is not detected correctly, depending onthe shape of the patient’s face.

Change the setting by pressing the R/L selection button if the indication of themeasuring eye side is not correct.

• When moving the device with your hand, use the hand strap or neck strap (option). Tomove the device, be sure to hold the grip. Do not hold the hand strap only.

Accidentally dropping the device may cause an injury or a malfunction.For a malfunction caused by dropping the device, the warranty is not valid. You mustpay to repair the device.

• Bring the device to the patient’s face after drawing out the forehead rest.The device may contact the patient’s face.

• Keep the measuring window free of fingerprints and dust to prevent the measurementaccuracy from decreasing.

• The date and time may deviate if the battery is removed from the measuring unit for morethan 12 hours. In this situation, reset the date and time.

• The measured values of objective refractive power obtained by the ARK-30 are intendedto be used as a reference of lens prescription for the correcton of visual acuity with spectacleor contact lenses. Manifest refraction must be used as the basis for the spectacle orcontact lens prescription.

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CAUTION• Information on the avoidance of overexposure to potentially hazardous optical radiation

(ISO 15004: 1997)Spectrally weighted photochemical radiances LB and LA give a measure of the potentialthat exists for a beam of light to cause photochemical hazard to the retina. LB gives themeasure for eyes in which the crystalline lens is in place. LA gives this measure eitherfor eyes in which the crystalline lens has been removed (aphakes) and has not beenreplaced by a UV-blocking lens or for the eyes of very young children.The value stated for this ophthalmic device gives a measure of hazard potential whenthe device is operated at maximum intensity and maximum aperture. The values of LA

or LB for the ARK-30 are sufficiently low as shown on the following page.The retinal exposure dose for a photochemical hazard is a product of the radiance andthe exposure time. For instance, at a radiance level of 0.5 mW/(cm2•sr), 480 minirradiation of the dilated (8 mm diameter) pupil would cause the retinal exposure doselevel to attain the recommended exposure limit. If the value of radiance were reducedto 0.05 mW/(cm2•sr), ten times that time (i.e. 4800 min) would be needed to reach therecommended limit. The recommended exposure dose is based on calculations arisingfrom the American Conference of Governmental Industrial Hygienists (ACGIH) -Threshold Limit Values for Chemical Substances and Physical Agents (1995 - 1996edition).The following page shows the graph of spectrum output for the ARK-30. Patients willbe at low risk of acute optical radiation with the ARK-30. However, it is recommendedthat the intensity of light directed into the patient’s eye be limited to the minimum levelwhich is necessary for diagnosis. The total of the retinal exposure dose must be carefullywatched for infants, aphakes and persons with diseased eyes who are at greater riskwhen other ophthalmic devices with a high level of radiance are used in conjunction.

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LA (µW/cm2/sr) 380 - 700 nm 0.527

LB (µW/cm2/sr) 305 - 700 nm 0.056

*1

*2

*1

*2

LA (µW/cm2/sr) 380 - 700 nm 0.002

LB (µW/cm2/sr) 305 - 700 nm 0.030

AR-20/ARK-30

0

1

2

3

4

5

6

7

8

9

10

300 400 500 600 700 800 900 1000

波長：(nm)

放射

照度

：(μ

W/c㎡

)Irr

adi-

ance

:

Wavelength:

AR-20/ARK-30

0

1

2

3

4

5

6

7

300 400 500 600 700 800 900 1000

波長：(nm)

放射

照度

：(μ

W/c㎡

)Irr

adi-

ance

:

Wavelength:

ARK-30

ARK-30

CAUTIONSpectrum output of all light source during AR measurement (maximum light intensity)

Spectrum irradiance

Spectrum output of all light source during KM measurement (maximum light intensity)

Spectrum irradiance

*1 LA: Spectrally weighted photochemical aphakic source radiance*2 LB: Spectrally weighted photochemical phakic source radiance

2 - 5

Patient environmentThe patient environment represents a space where there is a possibility of direct contact betweenthe patient or the operator and third person.When another type of device is used in the patient environment, use a device that complieswith IEC 60601-1. If the devices that do not comply with IEC 60601-1 are used, it is necessaryto use an isolating transformer to power the device or to connect the devices to additionalprotective grounding.

Radius of 1.5 m

1.5 m 1.5 m

2.5 m

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2.2 Storage

CAUTION• Store the device in a place that is dry and free from poisonous gas.

• The device must be maintained under the following conditions during transport and storage(packed condition).

Environmental conditions Temperature: –20ºC to 60ºCHumidity: 10% to 95% (No condensation)A place with low dustA place not exposed to direct sunlight

2.3 Transport

CAUTION• Do not drag the cord or cables when moving the device to prevent an injury or a malfunction.

• Place the device in the shipping carton or optional carrying case when moving to anotherlocation. Do not use the carrying case if you ask the moving company to take care of thedevice.

Excessive vibration or impact may cause a device malfunction.

2.4 Installation

CAUTION• Do not install the device near water.

Keep water away from the device to prevent an electric shock or a malfunction.

• Install the device on a stable and level surface free from vibration and impact to preventa malfunction or an injury caused by knocking over the device.

• For printing, wireless communication is performed using infrared beams from themeasuring unit to the station. Install the device where the light-receiver window of thestation is not exposed to intense light such as sunlight and illumination that containsinfrared rays.

If the intense external light comes into the light-receiver window, printing may not beperformed correctly. Cut off sunlight with a curtain and turn off nearby illumination.

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CAUTION• Install the device in an environment that meets the following conditions.

Conditions in use Temperature: 10ºC to 40ºCHumidity: 30% to 75% (No condensation)Pressure: 700 hPa to 1060 hPaA place with little dustA place with little external lightA place free of vibration and impact

• This device complies with the limits for medical devices in IEC60601-1-2: 2001, EN60601-1-2: 2001, and Medical Device Directive 93/42/EEC. These limits are designed to providereasonable protection against harmful interference in a standard medical installation. Thisdevice generates, uses and can radiate radio frequency energy and, if not installed andused in accordance with the instructions, may cause harmful interference to other devicesin the vicinity. However, there is no guarantee that interference will not occur in a particularinstallation. If this device does cause harmful interference to other devices, which can bedetermined by turning the device off and on, the user is encouraged to try to correct theinterference by one or more of the following measures:

- Reorient or relocate the receiving device. - Increase the distance to the device. - Correct the device into an outlet on a circuit different from that to which the other

device (s) are connected. - Consult the manufacturer or field service technician for assistance.

• In installation and operation of the device, observe the following instructions about EMC(electromagnetic compatibility):

- Do not use the device simultaneously with other electronic equipment to avoidelectromagnetic interference with the operation of the device.

- Do not use the device near, on, or under other electronic equipment to avoidelectromagnetic interference with the operation of the device.

- Do not use the device in the same room with other equipment such as life-support equipment,other equipment that has major affects on the life of the patient and results of treatment, orother measurement or treatment equipment that involves small electric current.

- Do not use the device simultaneously with portable and mobile radio frequencycommunication systems because it may have an adverse effect on operation of thedevice.

- Do not use cables and accessories that are not specified for the device because thatmay increase the emission of electromagnetic waves from the device or the systemand decrease the immunity of the device to electromagnetic disturbance.

• The Electromagnetic Compatibility Directive sets the essential requirements for electricaland electronic equipment that may disturb, or be disturbed by, other equipment. The ARK-30 complies with these requirements as tabled on pages 11-1 to 11-3. Follow the guidancein the tables for use of the device in an electromagnetic environment.

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2.5 Wiring

CAUTION• Be sure to use a wall outlet which meets the requirements of the power specification.

If the line voltage is too high or too low, the device may not give full performance. Amalfunction or a fire may occur.

• Do not put many loads on one electrical outlet.A fire may occur.

• Insert the mains plug into a grounded wall outlet.An electric shock or a fire may occur in case of a device malfunction or power leakage.

• Securely connect the main plug into a wall outlet.A loose connection may cause a fire.

• Be sure to connect the interface cable, checking the symbols of input (IN: ) and output(OUT: ).

Correct communications will not be possible.

2.6 After Use

CAUTION• If the device will not be used for a long time, disconnect the power cord from the wall

outlet to prevent a fire.

• If the device will not be used for a long time, remove the battery from the device toprevent rust and deterioration of the battery.

• Store the battery with the contact away from metal.The contact is recessed to prevent easy contact. However, if the battery is stored with ametal necklace, etc., it may result in a short circuit, which may generate heat or amalfunction.

• When the device is not in use, turn off the power and put the dust cover on the device toprevent dust from affecting the measurement accuracy.

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2.7 Maintenance and Checks

CAUTION• Use the specified fuses to replace the old ones to prevent a fire.

• Disassembly is not permitted except at NIDEK or your authorized distributor.

• Never use organic solvents such as paint thinner to wipe the exterior.This may ruin the surface.

• When charging and replacing the battery, use the specified battery and charger (station ormeasuring unit) only. In addition, do not put foreign matters such as metal into the batteryslot to prevent a malfunction or a fire.

• Do not discharge the battery in other devices. Do not connect the positive and negativeterminals with metal such as wire to prevent damage, deterioration, and shortened life-span of the battery.

• Do not dismantle or modify the battery to prevent heat generation, explosion, orcombustion.

• Replace the printer paper with the specified paper only to prevent damage to the head.

• Before sending the device back to NIDEK for repair or maintenance, wipe the surface(especially the area that contacts the patient’s skin) of the device with a clean clothimmersed in ethyl alcohol for disinfection.

• Contact NIDEK or your authorized distributor to check whether the device needs themeasurement accuracy calibration if the AR-measured results are largely different fromthe subjective measurements.

2.8 Disposal

CAUTION• Follow local governing ordinances and recycling plans regarding disposal or recycling of

device components.Especially the disposal method of lithium-ion batteries varies according to thegovernment. A rechargeable lithium battery is used in the device. Follow the localgoverning ordinances and recycling plans when disposing of a board with lithiumbatteries.

• When disposing of packing materials, sort them by material and follow the local ordinancesand recycling regulations.

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2.9 Labels

To catch the attention of the user, some labels and indications are provided on the device.

[Measuring unit]

2 - 11

[Station]

200-240 V range

100-120 V range

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[Underside of battery]

[Measuring unit]

Power button

R/L selection button

CYL mode selection button

Angle correction button

Parameter setting button

Print button

R/K selection button

Start button

Charge indicator

Memory button

LCD screen

Grip

§3 CONFIGURATION

3 - 2

Angle correction button Used to rotate the main body 90º when thepatient is measured from the side.

This is used to measure a patient who islying down.When the parameter “41: SAGITTAL” isset to “YES”, pressing this button startsthe sagittal radius measurement.

CYL mode selection button Establishes the CYL mode of measured re-sults. Pressing this button changes the modein the order of CYL – → CYL + → CYL ± →CYL – → •••.• CYL + (Plus reading)

Cylinder data is displayed by the + reading.• CYL – (Minus reading)

Cylinder data is displayed by the – reading.• CYL ± (Mix reading)

In the AR measurement, cylinder data isdisplayed by the + reading when the re-fractive error is positive for any axis angle.In other cases, cylinder data is displayedby the – reading.In the KM measurement, cylinder data isdisplayed by the – reading.

See page 4-7 for details of the CYL mode.

Memory button Stores the measured results in memory.

The memory function stores the measuredresults of 30 patients (60 eyes).

R/L selection button Sets the measuring eye. Every time the but-ton is pressed, the indication changes in theorder of (or )→ < >→ < >→ (or )→ •••.If alignment is performed in the AUTO mode,

(right-eye) or (left-eye) will be iden-tified automatically.< > (< >) indicates that the right eye (lefteye) has been manually set.

R/K selection button Changes the measurement mode.

The mode changes in the order of R/Kmode (Serial AR & KM measurements)→R mode (AR measurement)→ K mode(KM measurement)→ R/K mode→ •••.

LCD screenDisplays the patient’s eye, target, focusingindicator, measured values, and measurementcount, etc.

The color of the characters and the back-ground on the LCD screen can be selectedfrom a combination of 28 kinds.

Start button Places the device into the measurable statefrom standby.

Print button Prints measured results, etc.

Parameter setting button Used to change the settings of the device.

Power button Turns the measuring unit on and off. Press-ing this button turns on the power and vice-versa.

Turning the power on places the deviceinto the standby mode.The position of the chart is initialized andthe chart lamp lights up.

GripUsed to hold the measuring unit. The batteryholder is mounted inside. Open the cover toreplace the battery.

Charge indicatorFlashes while the battery in the measuring unitis being charged.

3 - 3

Measuring window Forehead restEye mask Eye level marker

Cable connectorStand screw

Hand strap mounting hooksHand strap is to be attached to preventaccidental drop.

Target detector window

Focus detector window

Window for opticalcommunications andmeasuring eye (R/L)detection

Lock switchSlide this downward toremove the grip cover.

Neck strap mounting hooksOptional neck strap is to be attached.

3 - 4

Eye maskOpen this mask to shield the patient’s eyewhich is not measured.This allows the patient to fixate his/her eyeeasier.To avoid damage from impact, the eye maskis easily detached. To attach it, push lightlyaligning the hinge part with the main body.

Eye level markerA guide for the patient’s eye level for mea-surements. It is located at both the front andback sides of the eye mask.

Adjust the measuring unit so that the cen-ter of the patient’s eye is aligned with thisline.

Measuring windowThe patient looks at the chart through thiswindow.

Keep this window clean. The measuringwindow checker allows automatic confir-mation of cleanliness.

Forehead restPlace it against the patient’s forehead (top ofeyebrow) to stabilize the position of the mea-suring unit.

The push-type lock forehead rest can bedrawn out once it is pushed lightly.Use the forehead rest so that the measur-ing unit will not contact the patient’s face.

Stand screwThis screw secures the measuring unit to theportable stand (option).

Cable connectorConnector for the cable when the measuringunit is used by deriving power from the sta-tion.The battery can be recharged with the batteryinstalled in the measuring unit.Printing is possible by the connecting cable.

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Measuring unit stage

Feed button

Charge lampMemory lamp Pilot lamp

Cable connector

Light-receiver window for printing

Printer

[Station]

3 - 6

PrinterPrints measured results, etc.

Feed button ( )Feeds the printer paper. While this button ispressed, the paper is fed.

Memory lamp ( )Illuminates while data to be transmitted to anexternal computer, etc. is stored.

Charge lamp ( )Flashes while the battery is being charged.This lamp stays illuminated after the charg-ing is completed.

Pilot lamp ( )Illuminates when the station is supplied withpower and operating.

Measuring unit stageThe measuring unit is put on this stage whennot in use.

Light-receiver window for printingReceives the signal from the measuring unitduring printing.

The communication distance between themeasuring unit and station is within 1meter.

Cable connectorConnector for the cable when the measuringunit is used by deriving power from the sta-tion.

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Battery slot

Data input connector Data output connector

Power connector

Power switch

Cable hanger

3 - 8

Data input connector*The interface cable from a lensmeter importsmeasured values from the NIDEK’slensmeter.The ARK-30 measured results are exportedfrom the data output connector. The importedLM measured results are also exported fromthe data output connector.

Data output connector*The interface cable exports measured valuesto an external computer.

Power connectorThe supplied power cable is connected here.

This is the combination type with a fuseholder.Use the specified fuses.Spare fuses are mounted in the spare fuseholders inside the printer cover of the sta-tion.

Battery slotThe battery is inserted for recharge.

When the battery is inserted, charging willstart automatically and the charge lamp( ) will flash.

Cable hangerWhen the cable is not in use, it is placed onthis hanger.

The hanger can be easily detached since itis attached by a magnet.

* Accessory equipment connected to the analog and digital interfaces must be certified accordingto the appropriate national standards (for example, UL1950 for Data Processing EquipmentUL 2601-1 for Medical Equipment, and CSA C22.2 No. 601-1, EN 60601-1 and IEC 60601-1.) Furthermore, all configurations shall comply with the system standard IEC 60601-1. Anyonewho connects additional equipment to the signal input part or signal output part is responsiblefor making sure that the system complies with the requirements of the system standard IEC60601-1. If in doubt, consult the technical service department or your local representative.

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Battery remaining indicator

Measured valuesDisplays the latest measured results. The in-dicated items vary according to the measure-ment mode (R/K mode, R mode, K mode).

Measurement modeIndicates the selected measurement mode, R:AR measurement, K: KM measurement, Rand K: R/K measurement. The figures shownon the right and left represent the number ofmeasurements for each eye.

AXIS correction markThis is shown when AXIS is corrected by 90ºwith the angle correction button .

TargetUsed to bring the patient’s eye to the centerof the measuring optical axis as a guide.

Patient No.Displays the measured patient No. in a serialnumber.

The number is set in the parameter settingmode.

Focusing indicatorIndicates the distance between the measuringunit and the patient’s eye. This is a guide forfocusing.

Battery remaining indicatorIndicates the remaining charge amount of thebattery installed in the measuring unit.

( ) indicates that the battery is gettingweak and the battery needs recharging.

CYL mode indicationDisplays the established CYL mode.

Measuring eyeDisplays the right-side or left-side of the de-tected patient’s eye.

This can be manually set by pressing theR/L selection button .

CYL mode indication

Axis correction mark

Focusing indicator

Measured values

Patient No.

Corneal luminous spotOther spots around are theluminous spots of measur-ing light and sensor.

Measurement modeMeasuring eye

[LCD screen]This is a sample measurement screen in the R/K mode.

Target

4.1 Operation Flow

Power-ON

Measurements

→4.3 Measuring Procedures (p. 4-4)→4.4 AR (refractive error) & KM (corneal curvature radius)

Measurements (p. 4-18)→4.5 AR (refractive error) Measurement (p. 4-20)→4.6 KM (corneal curvature radius) Measurement (p. 4-22)→4.7 90° Angle Correction Function (p. 4-24)→4.8 Measurement Using Cable (p. 4-26)→4.9 Storing and Printing Measured Results

→4.9.1 Storing measured results (p. 4-28)→4.9.2 Printing stored data (p. 4-30)

→4.11 Sagittal Radius Measurement (p. 4-42)

Power-OFF

(Determine final prescription by subjective refraction.)

4.2 Before First Use

1. Unpack the contents from the shipping carton and check them.The standard configuration contains the following items:

• Measuring unit• Station• Cable• Power cord (with 2 and 3 prong conversion plug)• Battery• Dust cover• Hand strap (Attached to the measuring unit)• Spare printer paper (3 rolls)• Spare fuse (2)• Operator’s manual (this book)

Spare fuses are mounted in the spare fuseholders inside the printer cover of the station.

Spare fuse holder

§4 OPERATING PROCEDURES

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2. Put the station on a level surface such as a table and insert the power cord to the powerconnector.

3. Insert the power cord into the wall outlet after making sure that the power switch is off(½).

4. Turn the power switch on ( ).After the station is initialized, a short beep is produced twice and the pilot lamp ( ) turns on.

NOTE• If abnormal conditions are encountered when the station is turned on (½), a short beep

is produced and the lamp turns on to notify the operator.When the printer paper is all gone:

A beep is produced a few times and the pilot lamp ( ) flashes for aboutten minutes.→ Set the printer paper.

When the printer head is up:A beep is produced a few times and the charge lamp ( ) flashes for aboutten minutes.→ The lever on the printer must be flipped down.

5. Charge the battery.See “8.3 Charging Battery” for details.It takes 120 - 150 minutes to fully recharge the battery (Takes much longer if the battery isdeteriorated.)

NOTE• The battery is shipped with a full-charge. However, the battery may be self-discharged

if shipping takes a long time. It is recommended to recharge the battery before the firstuse.

6. After preparing the charged battery, install the battery into the measuring unit.See “8.2 Installing/Removing Battery” for details.Attach the optional neck strap if available.The hand strap and neck strap can be used at the same time.See “8.4 Detaching/Attaching the Strap” for details.

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7. Press the power button on the measuring unit control panel and make sure that theLCD screen illuminates.After “HANDY REF/KERATOMETER ARK-30”* appears, the initial screen is displayed.

“PRESS BUTTON” appears in the centerof the screen and the device goes into thestandby mode.In standby, the LCD screen is displayed, butthe measuring mechanism is not running.

8. Press the start button on the controlpanel.When “PRESS BUTTON” disappears, themeasuring unit goes into the measurementmode.The measurement mode is when themeasurement mechanism is running and themeasurement is ready to start.

9. Make the measuring and printing settings according to your usage pattern.The settings can be changed anytime. Make the settings according to the usage.See “6.1 Parameter Settings” for details.

This is all you have to do before use.

* “HANDY REF/KERATOMETER ARK-30” and “ARK-30 Type R” are nicknames. The officialmodel name of this device is “AUTO REF/KERATOMETER ARK-30”.

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Measuring eye(Auto-detected eye will be shown

with or .)

AR measurement countKM measurement count

Battery remaining indicator indicates that the battery needs charging.

(This is not shown when the device is used via the cable.)

Patient No.CYL mode

Measurement items S: Spherical power C: Cylindrical power A: Cylinder axis angle R1: Flattest meridian R2: Steepest meridian AXS: Corneal cylinder axis angleAs for KM measured values, the following can be set according to the parameter setting. AVE: Average of R1 and R2 CYL: Corneal cylindrical power AXS: Corneal cylinder axis angle

4.3 Measuring Procedures

This is the procedure when the measuring unit is operating on the battery. There is no need toturn on the station until printing measured results.See “4.8 Measurement Using Cable” if the measuring unit is power-supplied from the stationvia the cable.

CAUTION• When the device is used, use the hand strap or neck strap (option).

Accidentally dropping the device may cause an injury or a malfunction.

1. Press the power button on the control panel.

1) The LCD screen illuminates and “HANDY REF/KERATOMETER ARK-30” appears.

2) After about three seconds, a beep is produced twice and the initial screen is displayed.“PRESS BUTTON” appears in the center of the screen.

The screen displays the following: Patient No., Battery remaining indication, and CYL modeare shown in the upper part, and Measuring eye (auto detected or ), Measurement count,and Measurement items (initial setting: R/K mode) are shown in the lower part.

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Target

2. Press the start button on the control panel.“PRESS BUTTON” disappears and the measuring unit goes into the measurement mode*.The LCD screen is displayed as follows. The target is shown in the center.

Checking the measuring window before useWhether to check the measuring window cleanliness can be set by setting the parameter.An unclean measuring window will decrease the reliability of measurements. This checker aswell as visual inspection should be used for measurements under clean conditions.

See “6. OTHER FUNCTIONS” for details.

1) Press the start button in the standby status.“MEASURING WINDOW CHECKING”appears and the measuring window startschecking.Wait until a message appears.

NOTE• When checking the measuring window, keep objects off the front of the measuring

window. Even if the measuring window is clean, the message “NG!” may appear dueto obstructing objects. The message also may appear when the window is checkedwith the measuring unit on the station or a table.

2) A message appears.When “OK!” appears:The measuring windos is clean. After themessage diappears, the device goes into thenormal measurement mode.When “NG!” appears:Turn the power off and check that themeasuring window is clean. If not, clean it.

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No. Parameter Description1 STEP 0.12D / 0.25D

2 VERTEX D. 0 mm / 10.5 mm / 12 mm / 13.75 mm (default for N. Inc.) /15 mm / 16.5 mm

3 KM UNIT mm / D4 KM DISP. R1, R2 / AVE, CYL5 AXIS STEP 1°　/　5°7 AI MODE YES / NO

21 AUTO IOL YES / NO24 REF. INDEX 1.3375 / 1.336 / 1.332

NOTE• The checker works only before the first measurement after the power has been turned

on. Regardless of the message “OK!” or “NG!”, the checker does not work after thesecond measurement or later.

3. Establish the measurement conditions, etc. according to your usage pattern.

a. Parameter setting button See “6. Other Functions” for details.

NOTE• The following table includes the parameters related to the measuring procedure and

measured results. Make the settings according to your usage pattern.If not necessary, there is no need to change the parameters as they are stored in thedevice.

* The underlined items indicate factory-settings.

* Power-saving functionThere are two functions for power savings.1. The device returns to standby when not operated for approximately one minute in the

measurement mode.2. When the parameter “23. AUTO OFF” is set to “10”, the light quantity of the LCD back

light is reduced and the chart lamp goes out if the device is not operated for approximatelythree minutes after standby.Press the start button to place the device in the measurement mode.

b. CYL mode selection button

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This is the button to change the indication of the cylinder value (cylindrical power).CYL – ....Cylinder data is displayed by the – reading.CYL + ....Cylinder data is displayed by the + reading.CYL ± .... In the AR measurement, cylinder data is displayed by the + reading when the

refractive error is positive for any axis angle. In other cases, cylinder data isdisplayed by the – reading.In the KM measurement, cylinder data is displayed by the – reading.

* The mode can be changed even after the measurement.* All stored data are printed in the mode when printing.

NOTE• Corneal cylindrical power (CYL) axis (AXIS) indication of KM measured values

according to CYL modeMinus reading

• For AVE, CYL indication, CYL (cylindrical power) is displayed by – and AXISindicates the flattest meridian curvature radius direction.

• For R1, R2 indication, AXIS indicates the flattest meridian curvature radius (R1)direction.

Plus reading• For AVE, CYL indication, CYL (cylindrical power) is displayed by + and AXIS

indicates the steepest meridian curvature radius direction.• For R1, R2 indication, AXIS indicates the steepest meridian curvature radius

(R2) direction.

Screen indication CYL– CYL+ CYL±

AR measurement Minus reading Plus reading Mix reading

KM measurement Minus reading Plus reading Minus reading

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4. Press the R/K selection button to select a measurement mode.The R/K mode is the initial setting. Operation is not necessary when the eye is measuredcontinuously in the R/K mode.The measurement items corresponding to the selected measurement mode are displayed on thescreen.The mode changes in the order of R/K → R → K → R/K →•••.

R / K mode ••• AR & KM serial measurements

R mode ••• AR measurementValues are not displayed for the KMmeasurement items.

K mode ••• KM measurementValues are not displayed for the ARmeasurement items.

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Forehead rest

Eye masks

5. Prepare the patient and measuring unit.

1) Draw out the forehead rest.The push-type lock forehead rest can bedrawn out once it is pushed lightly.To prevent the forehead rest from poppingout accidentally, you are recommended toperform alignment after drawing out theforehead rest.

2) Clean the forehead rest with a clean clothsuch as a gauze.If necessary, wipe with a cloth soaked inrubbing alcohol.

3) Open the eye mask.Covering the idle eye with the eye maskstabilizes the other eye.

NOTE• The eye masks are configured to be detached by impact to prevent an injury or a device

malfunction.If the mask is detached by impact, push it lightly to set, aligning the hinge part withthe main body. (See “8.5 Attaching the Eye Mask”.)

4) Instruct the patient to take off eye glasses or contact lenses and sit on a chair.To measure a patient lying down, correct the CYL axis angle. See “4.7 90° Axis CorrectionFunction” for details.

NOTE• Give the following explanation to help the patient relax before the measurement.

“This device measures your eye with a weak infrared ray to find which kind of lensis suitable. The infrared ray does not harm your eyes.”

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Eye level marker

Focus detector window

Target detector window

Measuring eye detector window

Scenic picture with balloon

6. Perform alignment.Confirm the luminous spots on the cornea on the LCD screen and perform alignment until thecentral corneal luminous spot is placed inside the target.

1) Instruct the patient, “Look through themeasuring window. You will see a pictureof a balloon, watch the center of it withoutstraining.”

2) Bring the measuring unit close to thepatient’s eye and place the forehead restagainst the forehead (top of eyebrow).In this case, the eye level marker acts as aguide for the vertical position.

NOTE• When holding the measuring unit with

your left hand too, do not cover thedetection windows with your fingers.

Detection will fai l and correctmeasurement may not be possible.

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3) Adjust the position of the measuring unitso that the patient’s eye appears on the LCDscreen.Adjust the focus with back and forthmovements (focus on the patient’s eye).Either side of the patient’s eye may bemeasured first.

4) Make sure that the left-eye or right-eyeindication of the measuring eye is properlyshown.Normally, the left eye or right eye isautomatically detected, but detection maynot occur properly depending on thecondition of the measuring eye.In this case, press the R/L selection button

to select the applicable eye.When the manual setting is completed, theindication changes from / to < >/< >.

NOTE• Error message function of R/L auto detection

The R/L auto detection may not normallywork under such a specific condition thatthe patient wears a gauze mask. In thissituation, and flashes and “R/L?”is displayed for an error message.The measurement does not start when theerror message is displayed.

If the R/L auto detection is normally performed by removing the mask, or R or L ismanually set with the R/L selection button , the measurement can be started.

5) Perform fine alignment.Adjust the position of the measuring unituntil the corneal luminous spot is placedinside the target “ ”.

Indication of measuring eye“< >” mark indicates the right eye orleft eye has been specified manually.

Corneal luminous spot on patient’s eye

“R/L?” error message

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Focusing indicator

7. Adjust the focus.When the corneal luminous spot is placed insidethe target, the focusing indicator appears.If the focusing indicator does not appear, itmeans that the eye is not positioned in the rangeof focus detection.

Adjust the focus, paying attention to keep themeasuring unit horizontal to the patient and notto misalign the target. Tilt will cause an errorin the AXIS value.

1) Move the measuring unit back and forth until the focusing indicator shows the best state“ ”.

Too close to the patient’s eye.The bar increases as the measuring unit is moving closer to the patient’seye (maximum four bars).

Move the measuring unit away from the patient’s eye.

Best state.One bar is shown on each side.

Bring the measuring unit close to the patient’s eye.

Too far from the patient’s eye.The bar increases as the measuring unit is moving away from thepatient’s eye (maximum four bars).

NOTE• The measurement starts automatically when the eye is aligned in the horizontal and

vertical directions and the eye is focused.

• The device may not measure correctly if the eyelashes are on the measuring ray bundle.In this situation, instruct the patient to open his/her eye wide. If the patient cannotopen wide, lift the patient’s lid, paying attention not to press against eyeball.

• When data exceeds the measurable limit, the following error code will appear.(Measurable range over error)

Err + o .............. The spherical power is over the measurable limit of the + side.Err – o .............. The spherical power is over the measurable limit of the – side.Err c o .............. The cylindrical power is over the measurable limit.

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8. The measurement starts automatically when the eye is aligned and focused. (Auto-shotfunction)When the eye is aligned and focused, a beep will be produced to indicate that the measurementhas started.

The measurement procedure differs according to the measurement mode. See the following fordetails

“4.4 AR (refractive error) & KM (corneal radius curvature) Measurements (R/K mode)”“4.5 AR (refractive error) Measurement (R mode)”“4.6 KM (corneal curvature radius) Measurement (K mode)”

QUICK measurement modeNormally, the best state for the measurement is automatically detected and then themeasurement starts. However, accurate detection may not occur in the measurements forthose who move their eyes vigorously, children, and those who have eye anomalies, etc. Ifthe auto-shot function is not working, it is easier to make a measurement in the QUICKmeasurement mode. Press the start button again in the measurement mode to place thedevice in the QUICK measurement mode.

In the QUICK measurement mode, the KMmeasurement does not start but the ARmeasurement starts.“<QUICK>” appears in the upper part of thescreen, which represents that the QUICKmeasurement mode is set.Adjust the position of the measuring unit untilthe central luminous spot of the cornea is placedinside the target and adjust the luminous spotto a sharp focus since the focusing indicator isnot shown.Press the start button again to cancel theQUICK measurement mode.Take note that dispersions in the values of theQUICK measurement mode may be increased,compared to the normal measurement mode.

NOTE• In the QUICK measurement mode, measurement starts even if a luminous spot other

than the corneal luminous spot is placed inside the target “ ”. In such a case, themeasurement accuracy may decrease. Adjust the measuring unit so that the cornealluminous spot is placed inside the target.

• In the QUICK measurement mode, the fogging mode is automatically set to“HANDHELD” regardless of the setting of the “38. FOG MODE” parameter.See “6.1 Parameter Setting” for “FOG MODE”.

* In the R/K mode, the KM measuredvalues are not displayed.

Indication of the QUICK measurement mode

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Printout sample in QUICK measurement modeWhen printing is performed, "Q" thatindicates measurement performed inQUICK measurement mode is shown to theright of data.

9. When each eye is measured more than fivetimes and the data is stable, “FINISH”appears and the measurement is completed.(For the AI mode)*1

The latest values is displayed in the lower partof the screen with the measurement count.

NOTE• Press the start button to measure the same patient’s eye again.

“FINISH” will disappear and the device will return to the measurement mode.

• The device can store up to ten measurements for the left eye and right eye.If ten measurements are exceeded, the oldest data will be cleared in turn.

When the AI mode is set to NO, the latest values are displayed.Determine whether or not to finish the measurement, judging from the measured values andmeasurement count.

The latest values are displayed whenthe measurement is completed.

Indication of the QUICK measurement mode

*1 <AI mode>This is a mode in which the measurement is automatically completed after five or moremeasurements if the data values are stable without variations in the AR & KM measurements.

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10. Start the measurement of the other eye in the same manner.Perform in the same manner from Step 6.When the measuring unit is brought close to the patient’s eye and the patient’s eye is detected,the screen will change to the measurement mode.

NOTE• If the measurement fails, the following may be the main causes. Find the cause if the

measurement fails again.a. Patient blinked during the measurement.b.Eye lid or eyelash is on or around the target.c. The patient’s pupil is small.

(Let the patient be in a dark room for a while and wait until the pupil diameter becomes large enough for the measurement.)

d.Retinal reflection is extremely low due to an optical disease such as a cataract.e. There is an extreme distortion on cornea.

• Instruct the patient to close his/her eye before starting the next measurement.Let the eye rest to avoid a measurement failure by blinking.

When not measuring the other eye, skip to Step 11 and print the data out.

NOTE• When the parameter is not set to “AI mode”, you are recommended to take about five

shots of the AR measurement. If the measured results are not stable, take some additionalshots.

When the measurement of both eyes iscompleted, the measured results (medianvalues) will be displayed.(The latest values are displayed whenmedian values have not been obtained.)

Screen after measurement of both eyes

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11. Print the measured results.Press the print button , aiming themeasuring window on the measuring unit at thelight-receiver window on the station.Or put the measuring unit onto the stage andpress the print button .Before printing, make sure that the station turnson.

If holding the device, perform the operationwithin 1 meter.

Concurrently with the wireless communications, printing is performed by the station.A maximum of ten measurements of both eyes in each KM and AR measurement can be printed.After printing, the measuring unit goes into the standby mode.

CAUTION• When printing is performed with hand held (wireless communications), keep your

hand away from the light-receiver window of the station.Proper printing may not be performed due to interference of optical communications.

NOTE• There are two light-receiver windows on the station, at the front and on the stage.

Communications are possible by aiming the measuring unit at either side.

• The same data can be printed any number of times until the next eye is measured.

• When the parameter “PRINT” is set to “AUTO”, printing is performed by aiming themeasuring unit at the station without pressing the print button .

Within 1 meter rangeAim at the stage light-receiver window.

Aim at the front light-receiverwindow

Front light-receiver window

Stage light-receiver window

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12. After printing, press the start button to start the measurement continuously.The device displays the measured results instandby to save power.When only one eye is measured, 0 is displayedfor the value of the other eye side.

Pressing the start button is recommendedwhen the next patient is ready.Perform the procedure from Step 5 again.

NOTE• To measure another patient, be sure to start the measurement after printing or storing

the median values in memory.

13. To finish the operation, press the power button to turn off the measuring unit.Turning off the power frequently to save the battery power is recommended except in thecontinuous measurement.If the device is not used for a while, the power will turn off automatically through the auto-offfunction after three minutes without pressing the power button (when the parameter “23:AUTO-OFF” is set to “YES”).

14. Place the measuring unit onto the stage of the station.

NOTE• Do not put the measuring unit onto a table, wagon, etc. other than the station.

Accidentally dropping the measuring unit may cause an injury or a device malfunction.

15. When the device will not be used any more, turn off the station and put the dust cover onthe device.

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4.4 AR (refractive error) & KM (corneal curvature radius)Measurements (R/K mode)

This is a mode for the AR (refractive error) and KM (corneal curvature radius) measurementscontinuously.When the R/K mode is selected by pressing the R/K selection button , the refractive errorindications (S, C, A) and corneal curvature radius indications (R1, R2, AXS) are displayed onthe screen.

1. Start the measurement.The measurement starts automatically when the eye is aligned in the horizontal and verticaldirections and focusedThe eye is measured in the following order:

NOTE• Instruct the patient not to blink during the measurement. In addition, instruct the

patient not to blink and open his/her eyes right before the measurement to avoid ameasurement failure.

• Instruct the patient to open both eyes wide during the measurement.Closing one eye may cause an unstable fixation and the other eye will not open wide.

1) The KM measurement starts.↓

2) A short beep is produced and then the KM measured values and measurement count isdisplayed.↓

3) The chart is fogged.↓

4) The AR measurement starts.↓

5) A short beep is produced and the AR measured values and measurement count is displayed.↓

6) After this, the device returns to Step 1) and the KM measurement and AR measurement arerepeated when the eye is aligned and focused.(In the second measurement or later, additional fogging is automatically performed onlywhen the fogging condition of the patient eye could not be detected.)

As for KM measured values, the following can be set according tothe parameter setting.AVE: Average of R1 and R2 CYL: Corneal cylindrical powerAXS: Corneal cylinder axis angle

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When the parameter “AI MODE” is set to “YES”, the measurement is automatically completedafter five or more measurements if the data values are stable (small variations). When theparameter “AI MODE” is set to “NO”, the measurement is repeated until the device goes outof alignment and/or focus.

NOTE• When the device goes out of alignment and/or focus during the measurement, the

measurement will be interrupted. If the measurement is performed again, the measureddata is stored in addition to the previous measured results.

2. Finish the measurement.When the parameter “AI MODE” is set to “YES”, the measurement is automaticallycompleted after more than five times for both eyes if the data values are stable (smallvariations).The median values and measurement count will be displayed on the screen.

NOTE• Press the start button to measure again.

“FINISH” will disappear and the device will be placed in the measurement mode.

If the parameter “AI MODE” is set to “NO”, finish the measurement by moving themeasuring unit away (out of alignment and/or focus) from the patient’s eye.In this situation, “FINISH” does not appear, so determine whether or not to finish themeasurement judging from the measurement count. The latest values are displayed on thescreen.If the values of three or more measurements are obtained, the median values are printed.

Indication sample during the measurementThe latest values are displayed after three times ofeach AR measurement and KM measurement.

Measured results of right eye

Measured results of left eye

The median values of each measurement will be displayed.(The latest values when the median values have not been ob-tained.)The measurement count shows the number of data measured andstored.

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4.5 AR (refractive error) Measurement (R mode)

This is a mode for the AR (refractive error) measurement.When the R mode is selected by pressing the R/K selection button , the following screen isdisplayed.

1. Start the measurement.The measurement will start automatically when the eye is aligned in the horizontal and verticaldirections and focused.The eye is measured in the following order:




1) The chart is fogged.↓

2) The AR measurement starts.↓

3) A short beep is produced and then the AR measured values and measurement count aredisplayed.↓

4) After this, the device returns to Step 1) and the AR measurement is repeated while the eye isaligned and focused.(In the second measurement or later, additional fogging is automatically performed onlywhen the fogging condition of the patient eye could not be detected.)

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When the parameter “AI MODE” is set to “YES”, the measurement is automatically completedafter five or more measurements if the data values are stable (small variations). When theparameter “AI MODE” is set to “NO”, the measurement is repeated until the device goes outof alignment and/or focus.

2. Finish the measurement.When the parameter “AI MODE” is set to “YES”, “FINISH” appears and themeasurement is automatically completed after five or more measurements if the datavalues are stable (small variations).The median values and measurement count are displayed on the screen.


“FINISH” disappears and the device goes into the measurement mode.

When the parameter “AI MODE” is set to “NO”, finish the measurement by moving themeasuring unit away (out of alignment and focus) from the patient’s eye.In this situation, “FINISH” does not appear, so determine whether or not to finish themeasurement judging from the measurement count. The latest values are displayed on thescreen.If the values of three or more measurements are obtained, the median values are printed.

Indication sample during the measurementThe latest values are displayed after three times ofthe AR measurement .



The median values of each measurement are displayed.(The latest values when the median values have not beenobtained.)The measurement count shows the number of data mea-sured and stored.

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As for KM measured values, the following can be set accordingto the parameter setting.AVE: Average of R1 and R2 CYL: Corneal cylindrical powerAXS: Corneal cylinder axis angle

4.6 KM (corneal curvature radius) Measurement (K mode)

This is a mode for the KM (corneal curvature radius) measurement.When the K mode is selected by pressing the R/K selection button , the following screen isdisplayed.

1. Start the measurement.The measurement starts automatically when the eye is aligned in the horizontal and verticaldirections and focused.The eye is measured in the following order:




1) The KM measurement starts.↓

2) A short beep is produced and then the KM measured values and measurement count aredisplayed.↓

3) After this, the device returns to Step 1) and KM measurement is repeated while the eye isaligned and focused.

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When the parameter “AI MODE” is set to “YES”, the measurement is automatically completedafter five or more measurements and the data is stable (small variations). If the parameter“AI MODE” is set to “NO”, the measurement is repeated until the device goes out of alignmentand/or focus.

2. Finish the measurement.If that the parameter “AI MODE” is set to “YES”, “FINISH appears and the measurementis automatically completed after five or more measurements and the data is stable (smallvariations).The median values and measurement count are displayed on the screen.


“FINISH” disappears and the device goes into the measurement mode.

When the parameter “AI MODE” is set to “NO”, finish the measurement by moving themeasuring unit away (out of alignment and focus) from the patient’s eye.In this situation, “FINISH” does not appear, so determine whether or not to finish themeasurement judging from the measurement count. The latest values are displayed on thescreen.If the values of three measurements or more are obtained, the median values are printed.

Indication sample during the measurementThe latest values are displayed after threetimes of KM measurement.



The median values of each measurement are indicated.(The latest values when the median values have not beenobtained.)The measurement count shows the number of data mea-sured and stored.

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Axis correction mark

4.7 90º Angle Correction Function

This device is configured to display thecylinder axis indication properly when thepatient’s eye is measured while facing thedevice. If the measuring unit is tilted 90º tomeasure a patient who is lying down from theside, the angle of cylinder axis is corrected90º.

NOTE• Do not use the forehead rest when the eye is measured from the side.

Pressure may be applied to the idle eye.Closing the eye mask is recommended.

1. Press the angle correction button before performing alignment in Step 6 of “4.3Measuring Procedures”.The measurement either from the right side or left side is performed in the same way. When theeye is measured at the position of 180 degree (behind the patient), the measurement is possiblewithout pressing the angle correction button .When the angle correction button ispressed, the axis angle is corrected by 90º andthe AXIS correction mark ( ) is displayed atthe left of the screen center.

2. Press the R/L selection button to set the measuring eye.Let the R/L indication on the LCD screen show the eye side to be measured.When the eye is measured from the side, the R/L auto-detection does not work. Press the R/Lselection button to specify R or L (displayed with < >/< >) manually.

3. Start the measurement in the same manner with normal measurement.Set the measuring unit so that it faces 90º against the patient.Place your left hand on the patient’s face and measuring unit to stabilize the position of themeasuring unit.

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AXIS correction mark

CAUTION• When bringing the measuring unit close to the patient’s face, pay attention not to contact

the patient’s face.When the eye is measured without the forehead rest, the measuring unit may contactthe face accidentally.

NOTE• When the other eye is measured without the angle correction after one eye has been

measured with the angle correction, press the angle correction button to cancel theAXIS correction function.

When the measured results are displayed,the AXIS correction mark is displayed atthe right of the patient No.

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Straight plug

Supplied connecting cable

L plug

4.8 Measurement Using Cable

The measuring unit is normally battery-operated. If the battery is getting weak, the measuringunit can be used by deriving power from the station via the supplied cable.When the battery is installed in the measuring unit, the battery charging starts as soon as themeasuring unit is turned off.

1. Connect the straight plug of the cable to the connector on the station and connect the Lplug on the measuring unit.Align the plug with the connector and insert the plug.The straight plug and the L plug can be connected to each connector in reverse.

2. Turn on the power switch (½) of the station.

3. Press the power button on the measuring unit.After “HANDY REF/KERATOMETER ARK-30” appears, the measuring unit goes into thestandby mode.

4. In the following measurements, operate the device in the same manner as a battery-operated one.

NOTE• When the device is used via the cable, there is no need to aim the measuring unit at the

light-receiver window of the station when printing.

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Cable hanger

Charge indicator

Connecting cable

5. After use, store the cable in the cable hanger.The cable hanger is attached to the rear side of the stage by a magnet. Take off the cable hangerand pass the cable through it. Then, set the cable hanger as it was.

CAUTION• Pay attention to the position between the station and measuring unit so as not to pull

the station with the cable.Accidentally dropping the station may cause an injury or a device malfunction.

When charging is performed with the battery installed in the measuring unitWhen the battery is installed in the measuring unit, charging starts as soon as the measuringunit is turned off. (In this case, do not turn off the station.)

During charging, the charge indicator ( )on the lower side of the control panel flashes.It takes 120 - 150 minutes to fully rechargethe battery (Takes much longer if the batteryis deteriorated.)

When charging is completed, the chargeindicator ( ) will stay illuminated.

CAUTION• Do not remove the battery from the

measuring unit when charging.A malfunction may result.

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4.9 Storing and Printing Measured Results

4.9.1 Storing measured results

The data memory function allows you to store measured results of 30 patients (60 eyes). Medianvalues and individual measured values (maximum ten times for each) can be stored in memoryas measured results.To make measurements continuously without printing every measurement, store the measuredresults. When the next eye is measured, the previous results will be cleared.In this case, record the patient No. to keep the correspondence between the patient and data.Storage of the measured results is possible either before or after printing.The measured results in memory will be maintained even if the battery is fully discharged.

1. Press the memory button after the measurement (“FINISH” on the screen).The measured results will be stored as well as the date, time, and patient No.For the R/K mode

The measured results of refractive error measurement data of both eyes and measurementdata of the corneal curvature are stored.

For the R modeThe measured results of refractive error measurement data of both eyes are stored.

For the K modeThe measured results of corneal curvature measurement data of both eyes are stored.

2. “No. XXXX IS STORED. / 30 ARE STORED.” appears.“XXXX” represents the patient No. of thestored data.“ / 30” represents the number of stored dataand the number of maximum storage data (30patients).The screen returns to the measured resultindication. (can be returned by pressing thememory button .)

If the number of stored data has reached themaximum (30), a beep is produced and“MEMORY FULL. 30/30 ARE STORED.”appears. The data will not be stored.Perform the memory printing (printing of allstored data) and clear the measured results inmemory, and then start the measurement andstorage.

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NOTE• Once the measured results are stored in memory with the memory button , pressing

the memory button does not store data until the next measurement is completed.(so as not to store the same value.) In this situation, “ /30 ARE STORED.” is displayed.

• In the sagittal radius measurement, measured results of 30 patients (60 eyes) cannot bestored in memory.

Confirmation of the number of stored dataTo confirm the number of stored data, press the memory button in the state the measurementhas not been completed. (The measurement count on the screen shows 0.)

“ /30 ARE STORED.” appears. The screen returns to the original indication a few secondslater.Pressing the memory button also returns to the original indication.

NOTE• Confirm the number of stored data after making sure that the measurement has not

been completed. (The measurement count on the screen shows “0”.)If the memory button is pressed when the measurement has already beencompleted and measured data are displayed, the measured results are stored. Onlythe accidentally stored data cannot be cleared.

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4.9.2 Printing stored data

All data in memory can be printed. See “4.9.4 Confirming measured results in memory” forprinting each data.

1. Hold the memory button down until “ /30 ARE STORED.” appears on the LCDscreen (about two seconds).

2. Put the measuring unit onto the stage of the station and press the print button .The contents of all data displayed in “ /30” are printed.Upon communicating, printing is performed from the station.See “5. Printout” for details.

NOTE• The description to be printed depends on the settings of the parameters “14: AR PRINT”

and “15: KM PRINT”.“ALL” ....... Median values + Individual measured values“SHORT” .. Median values only

• When ten-time measured values of both eyes of 30 patients are stored, memory printingmay not be performed because data is too large, depending on the setting of the parameter“14: AR PRINT”, “15: KM PRINT”, or “27: I/F FORMAT”.

In such a case, set the parameters “15: KM PRINT” and “27: I/F FORMAT” to“SHORT”. It makes memory printing of all data of 30 patients possible.

• In the CYL mode, all data with the present-displayed CYL mode is printed.

• For the memory printing (printing of all stored data), do not perform the hand-heldwireless communication.

Data cannot be transmitted correctly due to the large amount of data. When themeasuring unit and station are connected via the cable, there is no need to put themeasuring unit onto the station.

• Pressing the memory button returns to the measurement screen without printing.

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3. The number of data transmissions is counted on the LCD screen during printing.During the data transmission, “NOWPRINTING... / ” is displayed and “ / ARESTORED.” flashes.“ / ” indicates “The number of datatransmitted/The total number of data to bestored”.The sample on the right shows that 12 data arebeing transmitted and 7 of them have beentransmitted.

4. Make sure that the data transmission is completed for printing out.If “NOW PRINTING...” is not displayed, it means that the data transmission was completed.The measuring unit can be operated even while the station is printing.

NOTE• The same printing can be performed any number of times until the stored data is cleared.

• When the RT, etc. is connected, printing and data transmission are performed at thesame time.

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4.9.3 Clearing measured results in memory

To clear all of the measured result data in memory, follow the procedure below.


2. Hold the CYL mode selection button d o w n u n t i l “ C L E A R A L L D ATA...REALLY? / 30 ARE STORED.” appearson the LCD screen (about two seconds).

3. Press the CYL mode selection button again.All stored data is cleared and “MEMORYDATA CLEARED.” appears.

To cancel the data clear, press the memorybutton .The screen in Step 1 is displayed.

4. After a while, “0/30 IS STORED.” appears.Press the memory button to return tothe standby screen (display in blue).

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4.9.4 Confirming measured results in memory

To confirm the stored data, follow the procedure below. One data of the measured results on thescreen can be printed while displayed.


2. Press the parameter setting button .The stored median value data (The latest values when the median values have not been obtained)will be displayed.To confirm the individual measured values, set the parameters “14: AR PRINT”and “15: KMPRINT” to “ALL” and then print it out.

The operation on this screen is as follows.Memory button .................. Displays the next median value data.R/L selection button .......... Displays the previous median value data.Print button ........................ Prints the data on the displayed screen.Parameter setting button .... Exits from this screen and returns to the screen in Step 1.

NOTE• The description to be printed depends on the settings of the parameters “14: AR PRINT”

and “15: KM PRINT”.“ALL” ....... Median values + Individual measured values“SHORT” .. Median values only

Patient No.Stored order/ The number of stored data(For this screen, 01/16 representsthe first data of stored 16-patientmeasurements.)

Median value data(The latest values when the medianvalues have not been obtained.)

4 - 34

4.10 Connection with External Devices

As an external device, the ARK-30 outputs data to the NIDEK motorized refractor (hereafterreferred to as RT), computer, and IC card reader/writer, and inputs data from the NIDEK lensmeter(hereafter referred to as LM).

CAUTION• When connecting the interface cable, be sure to turn off each device.

Connecting the cable with the power on may cause a malfunction.

4.10.1 Output to the RT or computer

Any printed data can be output to the RT or a computer. AR data transmitted to the RT is used insubjective tests as objective measurement values. Data transmitted to a computer can be managedby database software for each system.

Data communications are performed by the RS-232C interface.Connect the data output connector ( ) on the station to the RT (or computer) via the optionalinterface cable.

Data output connector

AR data Test based on previous glasses val-ues and objective values.

Objective test Subjective test

AR, KM data

Managed by database softwareData output to RT

RT or computerInterface cable

4 - 35

1. After the measurement, press the print button on the measuring unit.Perform the operation in the same manner as normal printing.

2. The station automatically transmits data to the RT (or computer). When the ARK-30 isconnected to the RT, the station receives the data No. (ID No.).When the ARK-30 is connected to a computer, the station does not receive the data No. (IDNo.).

3. Measured data will be printed.When the device is connected to the RT, data No. (ID No.) is also printed.

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4.10.2 Input from the LM

The ARK-30 prints the LM data by inputting the data measured with the LM and also outputs theLM data to the connected RT. (The lensmeter provided with this function is needed.)The LM data transmitted to the RT is used in the subjective test as previous eyeglass values.

Connect the data input connector ( ) on the station to the LM, and connect the data outputconnector ( ) to the RT via the interface cables.

1. After the lens measurement with the LM, press the print button on the LM.

2. The station receives data from the LM, prints the LM data, and transmits the data to the RT.

LM data

Printing LM data

LM, AR data

Measurement of eye glasses

Objective test

Subjective test

Interface cable Interface cable

Data input connector Data output connector

Test based on previous glasses val-ues and objective values.

To RTTo LM

4 - 37

NOTE• When the device communicates with the LM, set the communication parameters of

each device as follows:See the Operator’s Manual for the setting method of each device.

Parameter setting of ARK-3028: Baud Rate = 960029: Bit Length = 8

Setting of NIDEK lensmeterRS-232C = NIDEKBaud Rate = 9600Parity = OddData Bits = 8Stop Bits = 1

When changing any setting of the ARK-30, perform printing.Upon printing, the parameter settings are transmitted to the station.

4 - 38

4.10.3 Output to the IC card Reader/Writer

Measured data can be transmitted to the IC card.Connect the data output connector ( ) to the IC card Reader/Writer (ICS-100) via the interfacecable.

There are two methods to transmit data to the IC card as follows: (Either method may be used.The difference is whether the IC card is inserted or not when the print button is pressed.)

A. Inserting the IC card before the measurement

1. Insert the IC card into the IC card Reader/Writer.

2. After the measurement, press the print button on the measuring unit.Perform operation in the same manner as normal printing.

3. AR data will be transmitted to the IC card and printed.

4. After the data is transmitted, the IC card is automatically ejected.

AR data

Objective testSubjective test

IC card

ICS-100 RT8IC-1

Test based on objective values.

ICS-100

IC card

4 - 39

B. Inserting the IC card after the measurement

1. After the measurement, press the print button on the measuring unit.Operate the device in the same manner as normal printing.

2. The memory lamp ( ) lights up and the AR data is printed.

3. Insert the IC card into the IC card Reader/Writer.The card may be inserted while the AR data is being printed.

4. The AR data is transmitted to the IC card and the IC card is automatically ejected afterthe data is transmitted.If the IC card is inserted during printing, the printing is interrupted and the data is transmitted.After the data is transmitted, the printing resumes.

NOTE• Only the AR data can be transmitted via the IC card. The KM data cannot be transmitted

via the IC card.

4 - 40

4.10.4 Output to the IC card Reader/Writer (EyeCa-RW)

Measured data can be transmitted to the IC card (Eye Care card).Connect the data output connector ( ) to the IC card Reader/Writer (EyeCa-RW) via theinterface cable.

There are two methods to transmit data to the Eye Care card; when measured data is printed andwhen measured data is not printed.

A. When measured data is printed:

1. Insert the Eye Care card with no measureddata in the ARK-30.A short beep is produced and the accessindicator illuminates in green.

2. After the measurement, press the print button on the measuring unit.Perform operation in the same manner as the normal printing.The access indicator changes to the orange one, and the data is written to the Eye Care card.After the data has been written successfully, a short beep is produced and the access indicatorflashes in green.

3. After the access indicator of the EyeCa-RW has changed to the green flashing one, removethe Eye Care card.

AR data

Objective test

Subjective test

EyeCa-RW EyeCa-RW

Test based on objective values.

Eye Care card

Access indicator

Eye Care card

EyeCa-RW

4 - 41

B. When measured data is not printed:Set the parameter “PRINT” to “Manu.” or “NO” in advance.See “6.1 Parameter Settings” for details.

1. After measurement, insert the Eye Care card.A short beep is produced and the access indicator illuminates in green. The access indicatorchanges to the orange one, and the data is written to the Eye Care card. After the data has beenwritten successfully, a short beep is produced and the access indicator flashes in green.

2. After the access indicator of the EyeCa-RW has changed to the green flashing one, removethe Eye Care card.Data in the ARK-30 will be erased.

NOTE• See the Operator’s Manual supplied with the EyeCa-RW for the other procedures.

4 - 42

4.11 Sagittal Radius Measurement

This measurement is not appropriate for Hand Held Measurement since the device shake disturbsthe measurement. Use something to fix the patient’s head such as the head rest of Slit Lamp, etc.Using the portable stand (option) is recommended.Change the parameter settings of No.41, 42 and 43 for sagittal radius measurement. See “6.1Parameter Settings” for the procedure.

1. Put the patient’s chin on the chin rest. Then ask him/her to put the forehead on theforehead rest.The patient’s head should be fixed to start this measurement.

2. Start the KM measurement in the R/K modeor K mode.When KM measurement has been made once ormore, SAGIT→ is displayed on the screen.

3. On condition that KM measurement hasstarted, press the angle correction button

.The measuring mode changes to the Sagittalradius measurement mode: Indicators of L(Left), R (Right), U (Up), and D (Down) appearand the L blinks to show the position of theilluminated fixation lamp that the patient wouldsee.

NOTE• The latest KM values are displayed on the LCD screen.

4. Instruct the patient to look at the red lighton the left side and not to move his/her head.

4 - 43

5. Adjust the position of the measuring unituntil the corneal luminous spot is placedinside the target “ ” and then performfocusing.

* Perform focusing until the focusing indicatoris displayed in one line.

6. Press the start button “ ”.Sagittal radius of the right part of the cornea ismeasured.“L” changes to “*” and then “R” starts blinking.

NOTE• If the measurement is erroneous, “L”

changes to “E (Error)”. In such a case,repeat the measurement by pressing thestart button . If “E” remains afterrepeating measurement, press the anglecorrection button to proceed to the“R” side.

7. Instruct the patient to look at the red lighton the right side and repeat Steps 4 - 6 forthe sagittal radius of the left eye.

8. Start measurements for D (Down) and U(Up) sides in the same manner.When all four measurements for a single eyeare completed, eccentricity value (E=) appearsand the mode returns to R/K mode or K mode.

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NOTE• In the serial measurement, median values for each side (L, R, U and D) are obtained

individually, and the eccentricity data is obtained by calculation on the basis of themedian values for the 4 sides and KM measurement (either median or the latest).When Sagit Axis parameter is set to “AXIS”, these values are converted for the angleof the steepest/flattest meridian which has been obtained in KM measurement.

• Concerning the side at which “E” is displayed, the value of the opposite side on thesame meridian is used for the calculation of eccentricity.

• If the eccentricity is displayed as “E = Err”, press the angle correction button torepeat measurement.

• If median values of the AR measurement or KM measurement are not obtained whenthe sagittal measurement has been completed, “---- L AR?KM? ----” appears insteadof “---- L FINISH ----”. Press the start button to continue measurement for medianvalues.

9. Repeat the same procedure for the right eye.It is possible to start binocular sagittal radiusmeasurement after KM measurements for botheyes have been completed.

10. Press the print button to print the Sagittal Radius measurement.Results in the sagittal measurement are not stored in memory for 30 patients (60 eyes) data.Store the results by printing.

NOTE• When measuring an additional patient, be sure to press the print button beforehand

to print and clear data.

• In the sagittal radius measurement, measured results of 30 patients (60 eyes) cannot bestored in memory

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* The following are sample printouts for the left eye and explanations of each data.

< Sample printout 1 >* This is the printout for when the parameter “43: Sagit Print” is set to “Short”.

< Sample printout 2 >* This is the printout for when the parameter “43: Sagit Print” is set to “All”.

< SAGITTAL > = Sagittal radius on each sideSUP. = Superior sideINF. = Inferior sideTEM. = Temporal sideNAS. = Nasal side

A = Axis of Steepeset meridian (of KM measure-ment)

(F = Fixation Angle)S = Sagittal data which the dRo value is added to

or reduced from Sagittal Radius valuese = Eccentricity values of each Sagittal radius

eh = Eccentricity on horizontal meridianev = Eccentricity on vertical meridianE = Total Eccentricity

ASTc = Corneal cylinder in the centerASTp = Corneal cylinder at the periphery

Rh = Average of corneal curvature on horizontalmeridian

Rv = Average of corneal curvature on vertical me-ridian

Ro = Average of corneal curvature in the centerdRo = Difference of corneal curvature between R1

and R2dAST = Difference of corneal cylinder between the

center and the peripheral

§5 PRINTOUT

5.1 Printing Measured Values

1. When all measurements are completed, press the print button while aiming the rearside of the measuring unit (measuring window) at the light-receiver window on the station.Measured data is printed.The communication distance between the measuring unit and the station should be 1 meter orless. You may aim the measuring unit either at the main body or stage of the station. Printingcan be performed in the state that the measuring unit is placed on the stage.If the parameter “PRINT” is set to “AUTO”, printing is performed automatically by aiming themeasuring unit at the station without pressing the print button .

NOTE• Do not touch the printer paper during printing.

This may cause text to be lost and light printed.

• Measured data can be printed any number of times while the measured results arestored in memory.

• After printing, the previous data is automatically cleared when the next measurementis started.

• While the feed button on the station is held down, the printer paper is fed.

<Printout sample 1>

NOTE• Printout sample 1 shows the printout

when the parameter “PRINT” is factory-set. (standard printing)

5 - 2

<Print sample 2>

Comment*9

Contact lens conversion value*7 Trial lens data*6

SE value*4

Eye print*5

KM median value*8

KM measured values

AR measurement ( ’), confidence index*2

S = Spherical power, C = Cylindrical power, A = Axis angle

Patient number ( ’)

Vertex distance*1Date and time of the measurement ( ’)Space for name and sex ( ’)

R1 = Flattest meridian, R2 = Steepest meridianAVE = Average of R1 and R2CYL = Corneal cylindrical powerdeg = Corneal cylinder axis

AR median value*3

5 - 3

NOTE• The contents on the previous page are printed when the parameter “9: PRT FORMAT”

is set to “R→L” and printing is performed in the order of right-eye measured value→left-eye measured value.

Printing can be performed in the order of AR measured value→ KM measured valueby setting the parameter to “R→K”.

• behind the description on the previous page shows that it is possible to select whetheror not to print the content in the parameter setting.

The content of ( ’) is factory-set to be printed.

*1 <Vertex distance>The distance between the corneal vertex to the posterior surface of the spectacle lens.

*2 <Confidence index>One of 6 steps (9, 8, 7, 6, 5, or E) is printed. “E” stands for error data.

*3 <AR median value>Printed when more than three measured values (without error or error data) are in memory.

*4 <SE (Spherical Equivalent) value>Calculated for the AR median values (or the latest value when the AR median values have notbeen obtained) and CL conversion values.

5 - 4

*5 <Eye print>Tells graphically the patient’s refractive status based on the median values. The eyeprint haseight patterns.

*6 <Trial lens data>Based on the AR median values, these are the values that were converted automatically fromthe cylinder values so that the spherical values for the trial lens will become smaller.

*7 <CL conversion value>In relation to the AR median values, these are the values that were converted into CL valueswith the vertex distance (VD) as “0” mm.

*8 <KM median value>Printed when more than three KM measured values (without error data) are in the memory.

*9 <Comment>Desired letters and symbols can be entered. See “6.3 Entering Comments” for details.

• Emmetropia

• Myopia

• Hyperopia

• Astigmatism

• Myopic astigmatism

• Hyperopic astigmatism

• Simple myopic astigmatism

• Simple hyperopic astigmatism

5 - 5

5.2 Other Prints5.2.1 Printout sample of stored data

The printout on the right shows the sample when the memory printing is performed as describedin “4.9.2 Printing stored data”. All of the data in memory is printed.

Parameter “14: AR PRINT” or “15: KMPRINT” is set to “SHORT”:

Only median values are printed.

Parameter “14: AR PRINT” or “15: KMPRINT” is set to “ALL”:

Median values and individual measuredvalues are printed.

The value without < > indicates that the AR me-dian values have not been obtained.(When the measured data is two or less, the lat-est values will be printed.)

5 - 6

Parameter settingsThe settings from parameter No. 1 to No. 43.(except for No. 25, No. 34, and No. 35)

Clock settting

Comment

Program version information (for maintenance)

CPLD version information (for maintenance)

5.2.2 Printout sample of parameter

Pressing the print button on the parameter setting screen prints the present Parameter settings,Program version, CPLD version, Clock setting, and Comment.See “6.1 Parameter Settings”.

6.1 Parameter Settings

The ARK-30 is equipped with the function to change the parameter settings of the device accordingto the operator’s needs. The method for confirming or changing each parameter setting is describedin the following section.

1. Press the parameter setting button ..The LCD screen displays “PARAMETERSSET [1]”, the parameters, and the settings.“STEP” of “1: STEP 0.25D” flashes, whichmeans that the parameter “1: STEP” can bechanged.

2. Select the applicable parameter by referring to the parameter table on pages 6-3 to 6-7.Move the flashing cursor to the desired parameter with the buttons. R/L selection button .. Moves the flashing cursor upward. Memory button .......... Moves the flashing cursor downward.

Pressing the CYL mode selection button switches the screen to the next page.The PARAMETERS SET screen has nine pages in total and 43 parameters.PARAMETERS SET [1] (No. 1 - No. 5)→ PARAMETERS SET [2] (No. 6 - No.10)→→ PARAMETERS SET [9] (No.41 - No.43)→ PARAMETERS SET [1] (No. 1 - No. 5)→

PARAMETERS SET [1](No.1 - No.5)

PARAMETERS SET [1] PARAMETERS SET [2] PARAMETERS SET [3]


§6 OTHER FUNCTIONS

6 - 2

3. Change the setting by pressing the start button or angle correction button ..Start button ............................. Changes the setting.Angle correction button ......... Reverses the setting.

Pressing the button changes the setting as explained in the parameter table on pages 6-3 to 6-7.Select the applicable setting.

NOTE• In the parameter table, the underlined items indicate factory-settings.

• Factory-settings differ in some areas or countries.

Select “34: CLOCK SET (setting of date andtime) or “35: COMMENT SET (setting ofcomment) and press the start button to gointo each setting mode.See “6.2 Setting Date and Time” or “6.3Entering Comments” for details.

4. Repeat Steps 2 - 3 to change the setting.

5. When all settings are selected, press the parameter setting button to exit from theparameter setting.The parameter settings are stored.

NOTE• Parameter settings are stored in memory even if the power button or power switch

is turned off.

• Do not turn off the measuring unit before pressing the parameter button . Otherwise,the parameter settings will not be saved.

• Pressing the print button will print the parameter settings out any time.


6 - 3

Parameter table<Parameter table 1> * The underlined items indicate factory-settings.

[Item No.1] STEP: 0.12D / 0.25DThe indication step for SPH and CYL data of the AR measurement, as well as the step of cornealrefractive power measurements (permitting the corneal curvature radius to be converted torefractive power).

[Item No.2] VERTEX D.: 0 mm / 10.5 mm / 12 mm / 13.75 mm / 15 mm / 16.5 mmThe distance between the corneal vertex to the posterior surface of the spectacle lens when thepatient wears glasses.* “13.75 mm” for the default of devices destined for NIDEK INCORPORATED.

[Item No.3] KM UNIT: mm / DSelection of whether to display the corneal curvature radius (mm) or corneal refractive power (D).

[Item No.4] KM DISP: R1, R2 / AVE, CYLSelection of the KM measurement display between R1 (flattest meridian) & R2 (steepest meridian),and AVE (average of R1 and R2) & CYL (corneal cylindrical power).

[Item No.5] AXIS STEP: 1º / 5ºThe indication step of the AXIS data for the AR measurement.

[Item No.6] PRINT: MANU. / AUTO / NOThe method to start printing.

MANU. ....Printing is started by pressing the print button ..AUTO .......Printing is automatically started after the measurement is completed. (Only active

when the AI mode parameter is set to “YES”.)NO ............Printing is not performed.

[Item No.7] AI MODE: YES / NOSelection of whether or not to use the AI mode. When “YES” is set, the measurement is automaticallycompleted after five or more measurements and the data values are stable without variations.

[Item No.8] ECONO PRT: YES / NOSelection of whether or not to use the economical print function.When “YES” is set, printing is performed with narrow line-spacing to save the printer roll.

[Item No.9] PRT FORMAT: R® L / R® KThe printing format of the measurement results. (See “5. Printout”.)

The following is the order of printing.R→L. ... Right-eye AR value→Right-eye KM value→Left-eye AR value→Left-eye KM valueR→K ... Right-eye AR value→ Left-eye AR value→ Right-eye KM value→Left-eye KM value

[Item No.10] PATIENT NO.: YES / NOSelection of whether or not to print the patient No.

No. Parameter Description1 STEP 0.12D / 0.25D2 VERTEX D. 0 mm / 10.5 mm/ 12 mm / 13.75 mm / 15 mm / 16.5 mm3 KM UNIT mm / D4 KM DISP R1, R2 / AVE, CYL5 AXIS STEP 1° / 5°6 PRINT MANU. / AUTO / NO7 AI MODE YES / NO8 ECONO PRT YES / NO9 PRT FORMAT R→L / R→K10 PATIENT NO. YES / NO

6 - 4

<Parameter table 2> * The underlined items indicate factory-settings.

[Item No.11] PATIENT NO.: 0001 to 9999The setting for the patient number.

Start button ........................... Increases the patient No.Angle correction button .......Decreases the patient No. (If pressed first, the setting will be reset to “0001”.)

[Item No.12] NAME PRINT: YES / NOSelection of whether or not to provide spaces for writing the patient’s name and sex.

[Item No.13] DATE FORMAT: Y.M.D / M.D.Y. / D.M.Y / NOThe format for printing the date.

Y.M.D ................ Year, Month, DateM.D.Y ............... Month, Date, YearD.M.Y ............... Date, Month, YearNO ..................... No printing

[Item No.14] AR PRINT: YES / NOThe print format for the AR measured results.

ALL ................... All data and median values are printed.SHORT .............. Only the median values are printed.

[Item No.15] KM PRINT: YES / NOThe print format for the KM measured results.

ALL ................... All data and median values are printed.SHORT .............. Only the median values are printed.

[Item No.16] SE PRINT: YES / NOSelection of whether or not to print the SE values, which are based on the AR median values (orthe latest values when the median values have not been obtained).

[Item No.17] EYEPRINT: YES / NOSelection of whether or not to print the eye print.

[Item No.18] TL PRINT: YES / NOSelection of whether or not to print the trial lens data, which is based on the AR median values.

[Item No.19] CL PRINT: YES / NOSelection of whether or not to print the CL conversion values, which are based on the AR medianvalues, and SE values of the CL conversion values.

[Item No.20] CONF. INDEX: YES / NOSelection of whether or not to print the confidence index.

No. Parameter Description11 PATIENT NO. 0001 to 999912 NAME PRINT YES / NO13 DATE FORMAT Y.M.D / M.D.Y / D.M.Y / NO14 AR PRINT ALL / SHORT15 KM PRINT ALL / SHORT16 SE PRINT YES / NO17 EYE PRINT YES / NO18 TL PRINT YES / NO19 CL PRINT YES / NO20 CONF. INDEX YES / NO

6 - 5


[Item No.21] AUTO IOL: YES / NOSelection of whether or not to use the Auto IOL mode. When “YES” is set, the IOL modeautomatically turns on if the measurement cannot be started due to reflected light other than thecorneal luminous spots on the IOL-implanted eye, etc. In the IOL measurement mode, themeasured results are easy to obtain by changing the measurement conditions to measure theIOL-implanted eyes. (See the description on page 6-7.)

[Item No.22] BEEP: HIGH / LOW / NOSelection of the beep tone that is produced during the measurement.

[Item No.23] AUTO-OFF: 3 / 10Setting the auto-off function. The power automatically turns off if any button is not pressed fora certain period time when the power is on. The certain period time can be selected from either3 (minutes) or 10 (minutes). The power turns off after a beep is produced for about one minute(at the interval of two seconds) when the auto-off function reaches its set time in a state that datahas not been printed or whose measured results have not been stored in memory after themeasurement is finished (FINISH). If necessary, save the data by printing or storing the measuredresults.

[Item No.24] REF. INDEX: 1.3375 / 1.336 / 1.332Selection of the corneal refractive index.

[Item No.26] I/F MODE: NIDEKSetting the device that the ARK-30 communicate with.

NIDEK .............. Communication with a NIDEK-brand device[Item No.27] I/F FORMAT: ALL / SHORT

The format of the data to be transmitted.ALL ................... All data are transferred.SHORT .............. Restricted data is transmitted.

[Item No.28] BAUD-RATE: 9600 / 4800 / 2400 / 1200Selection of the baud-rate (bit transmission speed) for communication.

[Item No.29] BIT LENGTH: 7 / 8The bit numbers for a single character used for communication.

[Item No.30] CR CODE: YES / NOSelection of whether or not to attach a CR (carriage return) code at the end of the transmissiondata.

No. Parameter Description21 AUTO IOL YES / NO22 BEEP HIGH / LOW / NO23 AUTO-OFF 3 / 1024 REF. INDEX 1.3375 / 1.336 / 1.33225 Unassigned26 I/F MODE ＮＩＤＥＫ

27 I/F FORMAT ALL / SHORT28 BAUD-RATE 9600 / 4800 / 2400 / 120029 BIT LENGTH 7 / 830 CR CODE YES / NO

6 - 6


[Item No.31] ERROR CODE: YES / NOSelection of whether or not to display an error message.

[Item No.32] IN PORT LM: NIDEKSetting related to the lensmeter to be connected to the data input connector. Never change the setting.

[Item No.33] LM DATA PRT.: YES / NOSelection of whether or not to print the communication data from the lensmeter connected to thedata input connector by the built-in printer of the ARK-30.When the parameter is set to “YES”, the data is printed from the ARK-30 printer by pressing theprint button of the lensmeter. (The lensmeter provided with this function is needed.) See theOperator’s Manual of the lensmeter for details.

[Item No.34] CLOCK SETSetting the time of the internal clock. See “6.2 Setting Date and Time” for details.

[Item No.35] COMMENT SETSetting the comment for printout. See “6.3 Entering Comments” for details.

[Item No.36] LCD BACKLIGHT: 1 - 9Brightness of the backlight on the LCD screen. The available setting is 1 - 9. Increased numberwill brighten the intensity of the backlight.

[Item No.37] LCD BRIGHTNESS: 1 - 9Brightness of the indications of the LCD screen. The available setting is 1 - 9. Increased numberwill brighten and sharpen the LCD indications. Set it to 9 usually.

[Item No.38] FOG MODE: HANDHELD / STANDSetting the fogging mode. HANDHELD and STAND are alternatives.HANDHELD allows a quick measurement by reducing the time starting the AR measurement,compared to STAND.HANDHELD should be selected for the hand-held use. STAND should be selected if focusingis stable by using a portable stand.

NOTE• If the backlight of the LCD screen is brightened with the parameter No.36: LCD

BACKLIGHT, it will shorten the useful time of the battery.Setting the parameter to the minimum value (darken the backlight) within the rangethat the screen can be legible will extend the useful time of the battery.

No. Parameter Description31 ERROR CODE YES / NO32 IN PORT LM NIDEK33 LM DATA PRT. YES / NO34 CLOCK SET Enters the setting mode of date and time.35 COMMENT SET Enters the setting mode of comment.36 LCD BACKLIGHT 1 - 9 (Factory setting: 8)37 LCD BRIGHTNESS 1 - 9 (Factory setting: 9)38 FOG MODE HANDHELD / STAND39 COLOR BLK/CYN (Choose from 28 kinds in all.)40 WINDOW CHECK DAY / YES / NO

6 - 7

[Item No.39] COLOR: BLK / BLU / RED / VIO / GRN / CYN / YEL / WHTColor setting of the characters and the background on the LCD screen. They can be selectedfrom a combination of 28 kinds. The following table indicates the color abbreviations.

[Item No.40] WINDOW CHECK: DAY / YES / NOSelection of whether or not to automatically check the measuring window for cleanliness.Pressing the start button starts automatically checking the measuring window for cleanlinessand the message “OK!” or “NG!” appears.• DAY ....... The measuring window is checked at the first startup of the day (when the start

button is pressed.)• YES........ The measuring window is checked at every startup (when the start button is pressed).• NO ......... The measuring window is not checked.


[Item No.41] SAGITTAL: YES / NOSelection of whether or not to measure Sagittal radius after KM measurement in R/K or K mode.

[Item No.42] SAGIT AXIS: AXIS / FIXSelection of whether or not to convert the sagittal radius measurement for the axis of the steepest/flattest meridian which has been obtained in KM measurement. To convert data, choose AXIS.

[Item No.43] SAGIT PRINT: ALL / SHORTSelection of the print format of sagittal radius measurement.

ALL. .........All data is printed.SHORT .....Only sagittal radius vaue and the total eccentricity are printed.

NOTE• Factory-settings may differ in areas or countries.

No. Parameter Description41 SAGITTAL YES / NO42 SAGIT AXIS AXIS / FIX43 SAGIT PRINT ALL / SHORT

BLK BLU RED VIO GRN CYN YEL WHTBlack Blue Red Violet Green Cyan Yellow White

6 - 8

“IOL” indication

Auto IOL measurement modeThe IOL measurement mode will automatically turn on when the measurement cannot be starteddue to reflected light other than the corneal luminous spots or abnormalities on the IOL-implantedeye, etc. Set the parameter “21: AUTO IOL” to “YES” to enable the Auto IOL measurementmode.

When the device is in the IOL measurementmode, “IOL” is displayed on the screen and thedevice operates as follows:

1) Even if abnormal reflected light is detected, the measured results can be obtained by changingits criteria.

2) If the auto-shot function does not work, the measured results are easy to obtain by changing theauto-shot criteria. • The measurement starts if the central luminous spot of the cornea is placed inside the target

““ ”. • Adjust the position of the measuring unit until the central luminous spot of the cornea is

placed inside the target and adjust the luminous spot to a sharp focus since the focusingindicator is not shown.

• The KM measurement does not start but the AR measurement starts.

When the measuring eye is switched between the left and right or printing is performed bypressing the print button , the IOL measurement mode is canceled.

NOTE• In the IOL measurement mode, measurement starts even if a luminous spot other than

the corneal luminous spot is placed inside the tartget “ ”. In such cases, themeasurement accuracy may decrease. Adjust the measuring unit so that the cornealluminous spot is placed inside the target.

• In the IOL measurement mode, take note that variations of the measured results mayincrease, in comparison to the normal measurement mode.

• The device may be placed in the IOL measurement mode even if the eyelid or eyelashis on or around the target.

In this situation, cancel the IOL measurement mode by instructing the patient toopen his/her eye wide. Then, measure the eye again.

• For 2) above, the IOL measurement mode is canceled and the normal measurementstarts when all luminous spots of the cornea are detected and the auto-shot functionstarts working normally.

6 - 9

Select the parameter “34: CLOCK SET”.

6.2 Setting Date and Time

The following section explains how to set the date and time.

1. Press the parameter setting button ..The LCD screen displays “PARAMETERS SET [1]”, the parameters and the settings.

2. Press the CYL mode selection button to change the screen to “PARAMETERS SET[7]”.

3. Press the R/L selection button ormemory button to align the flashingcursor on the parameter “34: CLOCK SET”.

4. Press the start button to enter the mode for setting the date and time.“CLOCK SET”, year, month, date, time, minutes, and seconds are displayed with the year (twodecimal places) flashing.The flashing indicates that the number can be changed.

NOTE• The clock function does not work while the date and time are being set. The clock

starts working when you exit from the setting mode for the date and time.

5. Press the memory button or R/L selection button to select the desired item.The selected item will flash.The order of selection is as follows.When the memory button is pressed:

“Year” → “Month” → “Date” → “Time” → “Minute” → “Year” →••••••When the R/L selection button is pressed:

“Year” → “Minute” → “Time” → “Date” → “Month” → “Year” →••••••

Flashing “Year” indicationIndicates that the number can be changed.

6 - 10

6. Press the start button or angle correction button to change the value.Start button ............................. Increases the number.Angle correction button ......... Decreases the number.

“Time” shown is a 12-hour format. The indication switches automatically between AM andPM.

7. Repeat Steps 5 - 6 to set the date and time.

8. When all settings are completed, press the parameter setting button to exit from thesetting mode.Pressing the parameter setting button sets the date and time and starts the internal clockfunction at the same time.To cancel the setting of the date and time, press the CYL mode selection button . You willexit from the setting mode.

NOTE• The date and time may deviate if the battery is removed from the measuring unit for

more than 12 hours. In this situation, reset the date and time.

6 - 11

1 2 3 4 5 6 7 8 9 01 11 21 31 41 51 61 71 81 91 02 12 22 32 42

1

2

6.3 Entering Comments

The comment that you want to print out can be changed (The initial setting is “NIDEK ARK-30”). The comment entered can be checked by printing out the parameter setting list with theprint button in the parameter setting mode.

1. Press the parameter setting button ..The LCD screen will show “PARAMETERS SET [1]”, the parameters and settings.

2. Press the CYL mode selection button to change the screen to “PARAMETERS SET[7]”.

3. Press the R/L selection button ormemory button to align the flashingcursor on the parameter “35: COMMENTSET”.

4. Press the start button to enter the setting mode.On the LCD screen, “COMMENT SET”, Comment entry box, and Character code are displayedwith the upper left box flashing.The flashing box indicates that the position where a letter can be entered. The character codedisplayed on “CHARACTER CODE” represents the present character code which is entered inthe box.

NOTE• Up to 24 characters can be entered in a line. Two lines are available for a total of 48

characters.Character No.

Line No.

Select the parameter “35: COMMENT SET”.

Character codeSelected from double-figure in hexa-decimal digit.“20” on the initial display indicates aspace.

Flashing cursor

Comment entry boxes(24 characters × 2 linescan be entered.)

6 - 12

5. Press the memory button or R/L selection button to move the flashing cursorto the applicable box.

Memory button ................Moves the flashing cursor to the right.R/L selection button .........Moves the flashing cursor to the left.

Pressing the button when the cursor is at the right end will move it to the left end of the lower(or upper) line.

6. Press the start button or angle correction button to change the character code.Start button ......................... Increases the character code.Angle correction button .....Decreases the character code.

Select “20 (space)” to delete the character (no character).The following characters and symbols can be entered.

7. Repeat Steps 4 - 6 to enter the characters.To confirm the present set description while acomment is being set, press ..Only comment will be printed.

8. When the characters are entered, press the parameter setting button to exit from thesetting mode.Pressing the parameter setting button stores the comment in memory.To cancel the comment, press the CYL mode selection button . You will exit from thesetting mode.To reenter a comment, press the power button to turn off the power, then turn the power onagain. Then start from Step 1.

Second digit ofcharacter code

First digit of character code

2 3 4 5 6 7 8 9

0 Space 0

1 1

2 ” 2

3 3

4 4

5 5

6 6

7 ’ 7

8 8

9 9

In the event that the device does not work correctly, correct the problem according to the followingtable before contacting your authorized distributor.

If the problem still cannot be solved, then contact your authorized distributor.

Symptom Action

The LCD screen does not turn ON.••

Check that the battery is properly installed.Battery may need charging. Check the battery.

The screen disappears suddenly.•

•

The auto-off function may be working.Press the power button.Battery may need charging. Check the battery.

Printing cannot be carried out.

••

•

Check the paper. Install a new roll if empty.The parameter "6: PRINT" may be set to "NO".Set the print format again.In wireless operation, the measuring unit may be distantfrom the station.Press the print button within 1 meter from the station.

The printer does work, however, printoutcannot be obtained.

• Printer paper may be installed upside down.Install the printer paper correctly.

The auto-shot function does not work.

•

•

•

Sunlight and room illumination may be reflecting on thecornea.In this situation, cut off those lights or change the directionof the patient and try the measurement again.For those who cannot fix their eyes, measure the eyes inthe QUICK measurement mode.The auto-shot function may not work on eyes withkeratoconus or a cornea with a recent operation.Set the parameter "21: AUTO IOL" to "YES" and try themeasurement again.

The date and time is not correct.• Battery may need charging.

Install the charged battery in the measuring unit and setthe date and time again.

The eye cannot be measured.

•

•

•

•

Patient may have blinked during measurement.Instruct the patient not to blink and try the measurementagain.Eyelid or eyelash may be in the way.Instruct the patient to open his/her eye wide. If theycannot, then lift the eyelid, being careful not to press yourfinger against the eye ball.The pupil may be too small. Have the patient sit in a darkroom for a while until the pupil opens enough and try themeasurement again.Data may exceed the measurable limit.

§7 TROUBLESHOOTING GUIDE

Lever/gear

Flip up the lever.

Printer paper

Roll shaft

Paper insertion slot

§8 MAINTENANCE

8.1 Replacing Printer Roll

When a red line appears on the side of the printer paper, it means that the paper is running short.Stop using the printer and replace the roll.

NOTE• Do not run the printer without paper.

It may ruin the printer head.

• Do not pull the paper in the printer forcefully.This may cause a printer malfunction. Be sure to use the feed button to feed thepaper.

1. Open the printer cover of the station.

2. Flip up the lever on the right side (Moves the printer head up) and turn the gear backwardsto rewind the paper.

3. Take out the used paper roll and remove theroll shaft.

4. Insert the shaft into a new paper roll.

8 - 2

5. Set the roll into the printer housing.If the roll is set upside down, the text will notbe printed on the paper. The rear side of theprinter cover has the symbol that shows theproper direction for installing the roll.Install the roll according to the symbol.

6. Cut the end cleanly and pass the paperthrough the insertion slot as illustrated onthe right.

NOTE• When the paper reaches the mark, turn

the gear on the right forward to feed thepaper.

7. Flip the lever down and close the printercover.

This symbol shows how to install the roll.

Turn the gear forward.

8 - 3

8.2 Installing/Removing Battery

The battery needs recharging if the “ ” symbol appears.If data has not been printed, remove the battery after printing. The stored data will be maintainedin memory even if the battery is removed.

1. Press the power button to turn off the measuring unit.

2. Remove the grip cover.Pull the cover toward you and remove it while pressing the lock switch on the side of the gripdownward.

3. Remove the battery.Slide the battery in the direction of the arrows as illustrated below to remove from the socket.

4. Prepare the fully recharged battery.

5. Insert the charged battery in the socket.Insert the battery, aligning the battery with the guide of the socket.

6. Attach the cover on the grip.

Grip cover

Battery

Battery socket

Lock switch

8 - 4

Triangle mark ( )

8.3 Charging Battery

Insert the used battery into the battery slot on the left side of the station and recharge the battery.

CAUTION• The battery has its useful life. If you notice that the battery needs to be recharged more

frequently, then this is an indicator that the battery needs to be replaced.

• Any abnormalities such as an odor, excessive heat, discoloration, deformation, etc.that are noticed during usage, charging or storage of the battery may indicate a defectivedevice or/and battery. Stop using the device and contact your authorized distributor.

1. Turn ON (½) the power switch of the station.

2. Insert the battery into the slot on the left sideof the station.Insert the battery with its triangle mark ( )pointing toward the station.

3. The battery is automatically charged and thecharge lamp ( ) flashes.It takes 120 - 150 minutes to fully recharge the battery (Takes much longer if the battery isdeteriorated.)

4. When the charging is completed, the charge lamp ( ) stays illuminated.

CAUTION• When charging is not completed even after the specified time, or the charge lamp

flashes faster than normal (twice per second), remove the battery from the slot onceand turn the power off and on and then reinstall the battery into the slot.

Heat, explosion, and combustion may occur if the battery is left under the condition.If the charging is not completed normally yet, replace the battery.

8 - 5

5. Remove the battery from the slot.

CAUTION• When charging and replacing the battery, use the specified battery and charger (station

or measuring unit) only. In addition, do not put foreign matters such as metal into thebattery slot to prevent a malfunction or a fire.

• Do not discharge the battery in other devices. Do not connect the positive and negativeterminals with metal such as wire to prevent damage, deterioration, and shortened life-span of the battery.

• Do not dismantle or modify the battery to prevent heat generation, explosion, orcombustion.

NOTE• Even while the battery is being charged, the station still can be operated.

• See “4.8 Measurement Using Cable” for details on charging with the battery installedin the measuring unit.

8 - 6

8.4 Attaching/Detaching the Strap

CAUTION• When moving the device with your hand, use the hand strap or neck strap (option). To

move the device, be sure to hold the grip. Do not hold the hand strap only.Accidentally dropping the device may cause an injury or a device malfunction.For a malfunction caused by dropping the device, the warranty is not valid. Youmust pay to repair the device.

The device is shipped with the hand strap attached. Follow the procedure below toattach and detach the hand strap or optional neck strap.

Detaching the hand strapRemove the screw from the hook and rotate the strap hinge about 180º and detach it raising.

NOTE• Be careful not to lose the removed screw.

After detaching the strap, tightening the removed screw is recommended.

1) Remove the screw from themounting hook with a coin orother tools.

2) Rotate the strap hinge asillustrated below.

3) Raise the strap hinge. 4) Detach the strap hingefrom the hook.

Align the strap hinge to the opposite sideof the flat surface of the hook.

Flat surface

Strap hinge

Mounting hook

Screw

8 - 7

Attaching the strapAlign the raised strap hinge to the mounting hook and put it down and then rotate 180º. Next,mount the screw so that the strap hinge will not be detached. Tighten the screw securely.

Adjusting the hand strapTo adjust the length of the hand strap, open thepad and adjust the position in which the end ofthe strap is attached to the Velcro fastener.

Attaching the neck strap (option)Pass the strap through the backle so that thestrap end comes inside.The strap may be detached if passed improperly.

Adjust the length of the strap so that themeasuring unit is positioned above the waist.

1) From the flat surface of themounting hook, align the raisedstrap hinge to the hook.

2) Put the hinge tothe opposite side.

3) Rotate 180º. 4) Tighten the screw in themounting hook with acoin or other tools.

The length of the strap can be adjustedwith the Velcro fastener.

Strap hinge

Strap hinge

Strap hinge

Mounting hook

Flat surface

Screw

8 - 8

8.5 Attaching the Eye Mask

The eye masks will become detached if you bump against them to prevent an injury and devicedamage.The following section explains how to reattach the eye mask.

1. With the eye mask in the closed direction,align the hinges with the holes on themeasuring unit.

2. Push the hinges into the holes with yourthumb.

Mounting hole

Eye mask

8 - 9

Power cord

Fuse holder

Fuse

8.6 Replacing Fuses

If the device does not work even though the power switch is on, the fuses may be burnt out.Replace the fuses with the ones that are supplied with the device.Spare fuses are installed in the spare fuse holders inside the printer cover of the station.

CAUTION• Use only the specified fuses to prevent a fire.

(Fuse rating: AC 100 to 120V→T1A 250V, AC 200 to 240V→T0.5A 250V)

1. Turn OFF ( ) the power switch on thestation and disconnect the power cord fromthe wall outlet.

2. Disconnect the power cord from the powerconnector.

3. Push in and hold the hooks on the left andright sides with a thin flatblade screwdriverand pull out the fuse holder.

4. Remove the used fuses and replace them withnew ones.

5. Install the removed parts in the reverseorder.

CAUTION• If fuses burn out frequently, do not touch the inside of the device but contact your

authorized distributor.If you touch the inside of the device, you may receive an electrical shock.

8 - 10

8.7 Cleaning the Measuring Window

Fingerprints or dust on the measuring window will decrease the reliability of the measurements.Be sure the window is always clean.

1. Blow off dust on the measuring window with a blower.

2. Lightly soak lens cleaning paper in alcohol,then wrap it around a thin object such as achopstick (or cotton swab). Use this to cleanthe glass of the measuring window.Use a thin stick that will not damage the glass.(Never use a hard object such as metal.)

Wipe lightly from the center of the measuringwindow to the outside in a circular motion.Do not allow the alcohol to contact the sensoror cover.

Do not allow the alcohol to contact the sensoror cover.

3. Make sure the window is clean with apenlight. If not, clean it again with a newpiece of cleaning paper.

Move the penlight at different angles to get agood view of the window.

Wrap cleaning paper around the tip.

Penlight

Do not allow the alcohol to contact the sensorwindow.The sensor window can be cleaned with drycleaning paper.

8 - 11

Item Order Number DescriptionPrinter roll 80620-00001 Width 58 mm, Length 25 m

Battery 80416-00014 Litium-ion battery, UR-121

Fuse 80402-02039 Ｔ1A 250V 5 × 20mm

Fuse 80402-02041 Ｔ0.5A 250V 5 × 20mm

8.8 Cleaning Exterior

When the cover or panel of the device becomes dirty, wipe with a soft cloth. For stubborn stains,immerse the cloth in a neutral detergent, wring well, and wipe. Finally wipe with a dry and softcloth.

NOTE• Never use an organic solvent such as paint thinner.

It may ruin the surface of the device.

8.9 Lists of Replacement Parts

* Always keep a spare fuse and printer paper roll in stock.

Measuring unit Measurement of refractive error (AR measurement)• Spherical power (S)

Measurable range –20.00 D to +22.00 D (V.D.=12 mm)Indication steps 0.12 D / 0.25 D

• Cylindrical power (C)Measurable range 0 D to ±12.00 DIndication steps 0.12 D / 0.25 D

[Accuracy*1]

• Cylinder axis (A)Measurable range 0° to 180°Indication steps 1° / 5°

[Accuracy*1]

*1 The accuracy specifications are based on the results ofeye model testing performed in accordance with ISO10342: 1997, Ophthalmic Instruments-EyeRefractometers.

* Cylinder axis shall be indicated as specified in ISO 8429.

• Minimum pupil diameter 2.6 mm in diametermeasurable

• Vertex distance 0 mm/ 10.5 mm/ 12 mm/ 13.75 mm/ 15 mm/ 16.5 mm• Relaxation of Auto-fogging system

accommodating eye

Measurement of corneal curvature (KM measurement)• Corneal curvature radius (R1, R2, AVE)

Measurable range 5.00 mm to 13.00 mmIndication step 0.01 mm

• Corneal refractive power (R1, R2, AVE)Measurable range 25.96 D to 67.50 D (n=1.3375)Indication steps 0.12 D / 0.25 DCorneal refractive index n = 1.3375 / 1.336 / 1.332

• Corneal cylindrical power (CYL)Measurable range 0 D to ±12.00 DIndication steps 0.12 D / 0.25 D

Criterion Measuring range Deviation fromthe nominal value

0.00 to ± 10.00 D ± 0.25 D

＞10.00 D(absolute)

± 0.50 D

Sphericaland

cylindricalvertex

§9 SPECIFICATIONS

Deviation fromthe nominal value

of the ARK0.25 D to 0.50 D ± 10°＞0.50 D to 3.00 D ± 5°＞3.00 D ± 3°

Cylinder axisfor cylidrical

power

Criterion

9 - 2

• Corneal cylinder axis (AXIS)Measurable range 0° to 180°Indication steps 1° / 5°

• KM measurable area 3.3 mm diameter on cornea(for corneal curvature radius of 7.7 mm)

Sagittal radius measurement• Measurable angle 25º each from the center

(up, down, temporal side, nasal side)• Sagittal radius measurement

Measurable range 5.00 mm to 10.00 mm Indication step 0.01 mm

• Eccentricity [E] Measurable range –4.10 to +2.05

Measuring time• Measurement of refractive power 0.2 seconds• Measurement of corneal curvature

radius 0.1 seconds

Chart Scenery chart

Observation and indications 2.5 inch color LCD monitor

Auto start The measurement starts automatically when the eye isaligned and focused.

Designation of left/right side Auto / Manual

Axis correction Manual selection (90°)

Dimension and weight 140 (W) × 130 (D) × 207 (H) mm,Approximately 980 g (including battery)

Station unit Printer unit• Printer Thermal line printer (Print speed: 25.4 mm/s)• Paper width 58 mm, roll paper• Transmission system Infrared (IR) interface

(Transmission distance: within approximately 1 meter)• Interface RS-232C

Battery-charging unit• Battery Lithium-ion battery (7.4 V 1600 mAh)• Battery charge Inserted in the station (Approximately 120 to 150 minutes)

* The measuring unit can be used during charging.Connected between the measuring unit and the stationvia the supplied cable.(Approximately 120 to 150 minutes)

* The measuring unit can be used during charging.

9 - 3

Power source• Input AC 100 to 120 V ±10% 50/ 60 Hz

AC 200 to 240 V ±10% 50/ 60 Hz• Power consumption 50 VA

Dimensions and weight• Station alone 249 (W) × 220 (D) × 102 (H) mm 2.5 kg• Station + measuring unit 284 (W) × 220 (D) × 216 (H) mm 3.5 kg

Printout• M/D/Y of measurement, Time of Measurement, Patient No.• Vertex distance• Measured value of refractive error (AR measurement)

Ten-time memory for left and right eyes:Median value(when the eye is measured three times or more)Latest value(when the eye is measured twice or less)

• Measured value of corneal curvature (KM measurement)Ten-time memory for left and right eyes:Median value(when the eye is measured three times or more)Latest value(when the eye is measured twice or less)

• Contact lens conversion value• SE (Spherical Equivalent) value• Optimum value of trial lens• Eye print

Interface• Interface which complies with RS-232C standard

Outputs all data except eye print which can be printed.

Environmental conditions (in transference and storage)• Temperature –20ºC to 60°C• Humidity 10% to 95% (No condensation)

Environmental conditions (in use)• Temperature 10ºC to 40°C• Humidity 30% to 75% (No condensation)• Pressure 700 hPa to 1060 hPa

10.1 Standard Accessories

Fuse ........................................... 4 pcs. (Two for station, spare fuses are mounted in the spare fuse holders inside the printer cover of the station.)

Printer paper .............................. 4 rolls (One for station)Power cord ................................ 1 pc.Dust cover ................................. 1 pc.Battery ....................................... 1 pc.Cable ......................................... 1 pc. (Measuring unit ↔ Station)Hand strap ................................. 1 pc. (Attached to the measuring unit)Operator’s manual ..................... 1 pc.

10.2 Optional Accessories

Carrying casePortable standIC card Reader/WriterNeck strap (Standard equipment for the US market only)

§10 ACCESSORIES

§11 EMC (ELECTROMAGNETIC COMPATIBILITY)

The Electromagnetic Compatibility Directive sets the essential requirements for electrical andelectronic equipment that may disturb or even be disturbed by other equipment. The ARK-30 complieswith these requirements as tabled below. Follow the guidance on the tables for use of the device inthe electromagnetic environment.

EMC (IEC 60601.1.2:2001)

Emissions test Compliance Electromagnetic environment - guidanceRF emissionsCISPR 11

Group 1 The ARK-30 uses RF energy only for its internal function.Therefore, its RF emissions are very low and are not likelyto cause any interference in nearby electronic equipment.

RF emissionsCISPR 11

Class B

Harmonic emissionsIEC 61000-3-2

Class A

Voltage fluctuations/Flickeremissions IEC 61000-3-3

Complies

Guidance and manufacturer's declaration - electromagnetic emissionsThe ARK-30 is intended for use in the electromagnetic environment specified below. The customer or the userof the ARK-30 should assure that it is used in such an environment.

The ARK-30 is suitable for use in all establishments otherthan domestic and those directly connected to the publiclow-voltage power supply network that supplies buildingsused for domestic purposes.

Immunity test IEC 60601 test level Compliance level Electromagnetic environment - guidanceElectrostaticDischarge (ESD)IEC 61000-4-2

±6kV contact±8kV air

±6kV contact±8kV air

Floor should be wood, concrete or ceramictile. If floors are covered with syntheticmaterial, the relative humidity should be atleast 30%.

Electrical fasttransient/burstIEC 61000-4-4

±2kV for power supplylines±1kV for input/outputlines


Mains power quality should be that of atypical commercial or hospital environment.

SurgeIEC 61000-4-5



Mains power quality should be that of atypical commercial or hospital environment.

Voltage, dips,shortinterruptions andvoltage variationson power supplyinput lines IEC61000-4-11

＜5% U T

(＞95% dip in U T)for 0,5 cycle40% U T

(60% dip in U T)for 5 cycles70% U T

(30% dip in U T)for 25 cycles＜5% U T

(＞95% dip in U T)for 5 sec

＜5% U T

(＞95% dip in U T)for 0,5 cycle40% U T

(60% dip in U T)for 5 cycles70% U T

(30% dip in U T)for 25 cycles＜5% U T

(＞95% dip in U T)for 5 sec

Mains power quality should be that of atypical commercial or hospital environment.If the user of the ARK-30 requires continuedoperation during power mains interruptions,it is recommended that the ARK-30 bepowered from an uninterruptible powersupply or a battery.

Power frequency(50/60Hz)magnetic fieldIEC 61000-4-8

3 A/m 3 A/m Power frequency magnetic fields should beat levels characteristic of a typical location ina typical commercial or hospitalenvironment.

Guidance and manufacturer's declaration – electromagnetic immunityThe ARK-30 is intended for use in the electromagnetic environment specified below. The customer or the userof the ARK-30 should assure that it is used in such an environment.

NOTE U T is the a.c. mains voltage prior to application of the test level.

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Immunity test IEC 60601 test level Compliance level Electromagnetic environment - guidance

Conducted RFIEC 61000-4-6

Radiated RFIEC 61000-4-3

3Vrms150kHz to 80MHz

3V/m80MHz to 2.5GHz

3Vrms(V1=3)

3V/m(E1=3)

Portable and mobile RF communicationsequipment should be used no closer to anypart of the ARK-30, including cables, than therecommended separation distance calculatedfrom the equation applicable to the frequencyof the transmitter.Recommended separation distanced =1.2x√Pd =1.2x√P 80MHz to 800MHzd =2.3x√P 800MHz to 2.5GHzwhere P is the maximum output power ratingof the transmitter in watts (W) according to thetransmitter manufacturer and d is therecommended separation distance in metres(m).Field strengths from fixed RF transmitters, asdetermined by an electromagnetic site survey,a

should be less than the compliance level ineach frequency range.b

Interference may occur in the vicinity ofequipment marked with the following symbol:

Guidance and manufacturer's declaration - electromagnetic immunityThe ARK-30 is intended for use in the electromagnetic environment specified below. The customer or the userof the ARK-30 should assure that it is used in such an environment.

NOTE 1 At 80MHz and 800MHz, the higher frequency range applies.NOTE 2 These guidelines may not apply in all situations. Electromagnetic propagation is affected byabsorption and reflection from structures, objects and people.

a. Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones andland mobile radios, amateur radio, AM and FM radio broadcast and TV broadcast cannot be predictedtheoretically with accuracy. To assess the electromagnetic environment due to fixed RF transmitters, anelectromagnetic site survey should be considered. If the measured field strength in the location in which theARK-30 is used exceeds the applicable RF compliance level above, the ARK-30 should be observed to verifynormal operation. If abnormal performance is observed, additional measures may be necessary, such asreorienting or relocating the ARK-30.b. Over the frequency range 150kHz to 80MHz, field strengths should be less than 3V/m.

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150kHz to 80MHzd =1.2√P

80MHz to 800MHzd =1.2√P

800MHz to 2.5Hzd =2.3√P

0.01 0.12 0.12 0.230.1 0.38 0.38 0.731 1.2 1.2 2.3

10 3.8 3.8 7.3100 12 12 23

Recommended separation distances between portable and mobile RF communications equipment and theARK-30

The ARK-30 is intended for use in an electromagnetic environment in which radiated RF disturbances arecontrolled. The customer or the user of the ARK-30 can help prevent electromagnetic interference bymaintaining a minimum distance between portable and mobile RF communications equipment (transmitters)and the ARK-30 as recommended below, according to the maximum output power of the communicationsequipment.

Separation distance according to frequency of transmitterm

For transmitters rated at a maximum output power not listed above, the recommended separation distance d inmetres (m) can be estimated using the equation applicable to the frequency of the transmitter, where P is themaximum output power rating of the transmitter in watts (W) according to the transmitter manufacturer.NOTE 1 At 80MHz and 800MHz, the separation distance for the higher frequency range applies.NOTE 2 These guidelines may not apply in all situations. Electromagnetic propagation is affected byabsorption and reflection from structures, objects and people.

Rated maximum output power of transmitterW

•AI modeIn this mode, the measurement is automatically completed after five or more measurements if the data values

are stable without variations in the AR measurement. When unstable data is included, additional measurements

are necessary until stable data is obtained.

• AR median value, KM median valueThe intermediate value of the measurements which are put in order in the computer. The latest value is selected

when the measured data is two or less.

• Auto IOLWhen the measurement cannot be started due to reflected light other than corneal luminous spots or abnormalities

on the IOL-implanted eye, etc., the IOL measurement mode will automatically turn on.

In the IOL measurement, measured results are easy to obtain by changing the measurement conditions so that

the IOL-implanted eyes can be measured.

• Auto-shotThis function automatically starts the measurement as soon as the eye is aligned and focused.

• CommentDesired characters and codes can be entered. Up to 24 characters/line and a maximum of two lines can be

entered.

• Contact lens conversion valueThe value that the AR median values (The latest values when the median values have not been obtained) are

converted into CL values, with the vertex distance (VD) at “0” mm.

• Eye printTells graphically the patient’s refractive status based on the AR median values (The latest values when the

median value have not been obtained).

• Measurable range over errorWhen the data exceeds the measurable limit, the following error code appears.

Err + o .............. The spherical power is over the limit in the “+” direction.

Err – o .............. The spherical power is over the limit in the “–” direction.

Err c o ............... The cylindrical power is over the limit.

• SE value (Spherical Equivalent)The value that is 1/2 of the cylinder value is added to the sphere value. Calculated for the AR median values

(The latest values when the median values have not been obtained) and CL conversion values.

• Trial lens dataBased on the AR median values, these are the values that were converted automatically from the cylinder

values so that the spherical values for the trial lens will become smaller.

• Vertex distanceThe distance between the corneal vertex to the posterior surface of the spectacle lens.

APPENDIX. A GLOSSARY

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